CN108733089A - A kind of contactless flowing and conduct heat control method and its device - Google Patents
A kind of contactless flowing and conduct heat control method and its device Download PDFInfo
- Publication number
- CN108733089A CN108733089A CN201810970285.XA CN201810970285A CN108733089A CN 108733089 A CN108733089 A CN 108733089A CN 201810970285 A CN201810970285 A CN 201810970285A CN 108733089 A CN108733089 A CN 108733089A
- Authority
- CN
- China
- Prior art keywords
- fluid
- magnet
- north
- south pole
- contactless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/03—Control of flow with auxiliary non-electric power
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The present invention relates to a kind of contactless flowing and heat transfer control devices, including several groups permanent magnet group, the permanent magnet group includes South Pole magnet and North magnet, the South Pole magnet and North magnet are symmetrically distributed in the both sides of fluid mass, so that being full of magnetic field inside fluid mass, the distance between the South Pole magnet and North magnet are greater than or equal to 1.5 times of fluid width and are less than or equal to 3 times of fluid width, the invention also discloses a kind of methods of contactless flowing and heat transfer control simultaneously, fluid mass and shape are determined first, permanent magnetism group is symmetrically distributed in fluid mass both sides again.The present invention not only has the characteristics that no flow dead zone, system are simple, implements and convenient disassembly, at low cost, but also can be used for the occasions such as highly corrosive, local high heat flux density fluid.
Description
Technical field
The invention belongs to fluid flowings and heat transfer control technology field, more particularly to a kind of contactless flowing and heat transfer
Control method and its device.
Background technology
The thermocapillary convection driven by non-equilibrium temperature gradient is present in many many engineer application fields and space is micro- heavy
Force environment, such as crystal growth, metal casting, metallurgy, plated film process.The thermocapillary convection generated during these can induce
The unstability of flowing, it will change fluid mass temperature field and distribution of concentration, to influence passage and the dopant of growth interface
In being uniformly distributed for fluid mass, i.e. gross segregation；When unstable state convection current occurs in fluid, by chemical composition in drainage body region
Variation, lead to the appearance of crystal striped, i.e. microsegregation.Microsegregation leads to the unevenness of crystal, cast member and coating performance
It is even, and the uneven of dislocation and stress is generated, or even seriously affect the performance of these products.
The processes such as crystal growth, metal casting, metallurgy, plated film are to be gradually transformed into a kind of dynamic of solid-state from molten condition to become
Change process, traditional flowing and heat transfer control method are difficult to realize in this process, to which these production processes can inevitably go out
The features such as existing crackle, bubble, component be uneven, cause to produce product such as monocrystalline silicon, cast member etc. cannot be satisfied requirement.
Magnetohydrodynamics is a cross discipline of Study of Fluid mechanics and electromagnetism.When conductor fluid is transported in magnetic field
When dynamic, conductor fluid and external magnetic field interaction will generate induced current, and induced current is acted on external magnetic field and being generated
The Lorentz force opposite with fluid direction of motion, it is uneven in fluid to the flowing for inhibiting fluid and its instable generation
The gradual of even Convection cell is suppressed, and internal temperature field areas is uniform.It can be by crystal growth, metal casting, metallurgy, plated film
Etc. processes apply external magnetic field, to realize the control to surface tension stream, to avoid the occurrence of the flaws such as the crackle in growth course
The appearance of defect.
Therefore, how to solve the cracked phenomenon of above-mentioned industrial processes and how this mistake realized by magnetic field
The flowing and heat transfer control of fluid in journey become the emphasis of those skilled in the art's research.
Invention content
It is an object of the invention to provide a kind of contactless flowing and heat transfer control method and its devices, can be fully solved
In place of above-mentioned the deficiencies in the prior art.
The purpose of the present invention is realized by following technical proposals：
A kind of contactless flowing and the control device that conducts heat, including several groups permanent magnet group, the permanent magnet group include south
Pole magnet and North magnet, the South Pole magnet and North magnet are symmetrically distributed in the both sides of fluid mass so that fluid mass
Inside be full of magnetic field, the distance between the South Pole magnet and North magnet be greater than or equal to 1.5 times of fluid width and be less than or
Equal to 3 times fluid width.
Preferably, the line and fluid flow direction between the South Pole magnet and North magnet midpoint are perpendicular.
Preferably, the spatial position of the South Pole magnet and North magnet is arranged symmetrically about fluid mass.
Preferably, the South Pole magnet and North magnet shape, size all same.
Preferably, the shape of the South Pole magnet and North magnet is cuboid, cylinder or sphere.
A kind of contactless flowing and control method of conducting heat, include the following steps：
1) fluid mass and shape are determined；
2) at least one set of permanent magnet group is taken, the South Pole magnet and North magnet of permanent magnet group is symmetrically placed in fluid mass
Arranged on left and right sides makes fluid mass be full of magnetic field, and the distance between adjusts South Pole magnet and North magnet and adjust in fluid mass
The size of magnetic field intensity, magnetic field generate the Lorentz force opposite with flow direction in fluid, to realize to conductor fluid stream
Dynamic and heat transfer Untouched control.
Preferably, the size of magnetic field intensity is greater than or equal to 0.5T in the step 2).
Compared with prior art, the beneficial effects of the present invention are：
The present invention is generated and is flowed when conductor fluid is by the field region due to providing external magnetic field using permanent magnet group
The dissipation effect of the opposite Lorentz force in dynamic direction, the Lorentz force of generation makes fluid flowing gradually be suppressed, and prevents fluid
There is flow unstable and the fluctuation of the unstability of the convection current that occurs, avoid the inhomogeneities of fluid heat transferring, to realize to fluid
The purpose of contactless flowing and heat transfer control.Therefore, mechanical means is substituted using the magnetic field of external permanent magnet offer
The control of fluid flow and heat transfer, while magnet can be located on the outside of fluid mass and realize non-contact with fluid, thus it is not
Only have the characteristics that no flow dead zone, system are simple, implement and convenient disassembly, at low cost, and in highly corrosive, part
The occasions such as high heat flux density fluid are applicable in remarkable advantage.
Description of the drawings
Fig. 1 is contactless flowing and the heat transfer control structure raw material figure of the present invention；
Fig. 2 is the vertical section upstream field pattern in fluid mass；
Fig. 3 is fluid mass horizontal section upstream field pattern.
Specific implementation mode
With reference to specific embodiments and the drawings, the present invention is further illustrated.
Embodiment one
As shown in Figure 1 to Figure 3, the present invention provides a kind of contactless flowing and heat transfer control devices, including several groups
Permanent magnet group 1, permanent magnet group 1 include South Pole magnet and North magnet, and South Pole magnet and North magnet are symmetrically distributed in fluid zone
The both sides in domain so that magnetic field is full of inside fluid mass, the magnetic field intensity in magnetic field is 0.5T, between South Pole magnet and North magnet
Distance be greater than or equal to 1.5 times of fluid width and be less than or equal to 3 times of fluid width, South Pole magnet and North magnet midpoint it
Between line and fluid mass flow direction it is perpendicular, the spatial position of South Pole magnet and North magnet is symmetrical about fluid mass
The shape of arrangement, South Pole magnet and North magnet shape, size, magnetic field intensity all same, South Pole magnet and North magnet is length
Cube, cylinder or sphere.
The device of contactless flowing and heat transfer control in the present embodiment, shape are needed according to fluid control zone
Depending on, and fluid mass is according to the difference of production, and include melting zone in crystal growing process, metal casting, metallurgy it is molten
Tabetisol, plated film fluid mass etc., permanent magnet group 1 i.e. be symmetrically distributed in these regions.
In processes such as crystal growth, metal casting, metallurgy, plated films, when 6 wall surface of fluid mass is there are when the temperature difference, under fluid
Wall surface forms high-temperature wall surface 4, and fluid upper wall surface forms low temperature wall surface 3, surface tension gradient will be generated on interface, to drive
Fluid flows to cold end from hot junction at interface, and the reflux that hot junction is flowed to from cold end is formed in fluid mass.Thermocapillary convection
The Convection cell 2 of formation occupies entire fluid space, left half-court in right-hand circular and right half-court be in left-hand circular；Fluid zone
6 vertical cutting surface current line of domain protrudes and intermediate recess at hot and cold both ends, a kind of typical " bottleneck " shape distribution is formed, such as Fig. 2 institutes
Show, separation-merging occurs in the Convection cell that thermocapillary convection is formed, to the cyclically-varying phenomenon detach-remerged again；Fluid
" petal-shaped " Convection cell (hydrothermal wave) is formed in zone level section, as shown in figure 3, with the increase of the temperature difference, Convection cell number
Gradually increase, and serious unstable phenomenon occurs in thermocapillary convection, in entire flow field regions flowing and heat transfer get muddled, fluctuation compared with
By force, convection current inhomogeneities is aggravated.
As shown in Figure 1, the permanent magnet group 1 of the present apparatus is symmetrically distributed in fluid mass, it is external when applying to fluid mass
At magnetic field 5, conductor fluid moves in magnetic field 5 and will produce induced current, and induced current and the interaction in magnetic field 5 can produce
The raw Lorentz force opposite with fluid motion, thus, external magnetic field 5 can realize convection current by the dissipation effect of Lorentz force
The untouchable control of body flowing, but Lorentz force can reduce with the reduction of fluid-flow rate, so to reach inhibition
The effect of fluid flowing generally requires larger magnetic field.In these application processes, the Lorentz force that magnetic field generates is analogous to
The body force of gravity can effectively weaken the flowing of fluid, and the unstability for avoiding flowing occurs, existing to the disorder of flowing
As being improved；In terms of the inhibition of magnetic field, its intensity can be controlled by outside, when magnetic field intensity gradually increases, convection current
Unstable inhibiting effect gradually increases, and Convection cell quantity is progressively reduced until disappearance, shows as vertical section flow field and tends to homogenize,
Cross section " petal-shaped " hot fluid wave number reduces until disappearing, and fluid mass temperature field tends to be uniform, is flowed in entire fluid mass
Body flows and heat transfer is actively controlled.
Embodiment two
As shown in Figure 1 to Figure 3, the present invention provides a kind of contactless flowing and heat transfer control devices, including several groups
Permanent magnet group 1, permanent magnet group 1 include South Pole magnet and North magnet, and South Pole magnet and North magnet are symmetrically distributed in fluid zone
The both sides in domain so that magnetic field is full of inside fluid mass, the magnetic field intensity in magnetic field is 2T, between South Pole magnet and North magnet
Distance is equal to 2 times of fluid width, and the line and fluid mass flow direction between South Pole magnet and North magnet midpoint are perpendicular,
The spatial position of South Pole magnet and North magnet is arranged symmetrically about fluid mass, South Pole magnet and North magnet shape, size,
The shape of magnetic field intensity all same, South Pole magnet and North magnet is cuboid, cylinder or sphere.
Embodiment three
As shown in Figure 1 to Figure 3, the present invention provides a kind of contactless flowing and heat transfer control devices, including several groups
Permanent magnet group 1, permanent magnet group 1 include South Pole magnet and North magnet, and South Pole magnet and North magnet are symmetrically distributed in fluid zone
The both sides in domain so that magnetic field is full of inside fluid mass, the magnetic field intensity in magnetic field is 5T, between South Pole magnet and North magnet
Distance is equal to 3 times of fluid width, and the line and fluid mass flow direction between South Pole magnet and North magnet midpoint are perpendicular,
The spatial position of South Pole magnet and North magnet is arranged symmetrically about fluid mass, South Pole magnet and North magnet shape, size,
The shape of magnetic field intensity all same, South Pole magnet and North magnet is cuboid, cylinder or sphere.
Example IV
A kind of device using described in any of the above-described embodiment realizes contactless flowing and control method of conducting heat, including with
Lower step：
1) according to production scene crystal growth, metal casting, metallurgy, plated film actual conditions, region and the shape of fluid are determined
By depending on the shape of cast member, (circle, rectangle, spherical shape or other opposite sex are tied for fluid mass in shape, such as metal casting operation
Structure)
2) at least one set of permanent magnet group is taken, the South Pole magnet of permanent magnet group and one the first from left right side of North magnet are positioned over fluid
Region arranged on left and right sides wall surface makes fluid mass be full of magnetic field, and the distance between adjusts South Pole magnet and North magnet and adjust stream
The size of magnetic field intensity in body region makes magnetic field intensity be greater than or equal to 0.5T, and magnetic field generates and flow direction phase in fluid
Anti- Lorentz force, to realize the Untouched control that flows and conduct heat to conductor fluid.
The control principle of this method：When fluid mass wall surface is there are when the temperature difference, surface tension gradient will be generated on interface,
To drive fluid at interface to flow to cold end from hot junction, and the reflux that hot junction is flowed to from cold end is formed at the heart in a fluid, custom
Claim thermocapillary convection.
External magnetic field is provided by permanent magnet group on the outside of fluid control zone, when conductor fluid is by the field region
Will produce induced current, the induced current and magnetic field interaction can be generated in fluid mass one it is opposite with fluid motion
The dissipation effect of Lorentz force, the Lorentz force of generation makes fluid flowing gradually be suppressed, and prevents fluid from flow unstable occur
And the unstability fluctuation of the convection current occurred realizes the flowing to fluid and heat transfer master to which fluid temperature (F.T.) region homogenizes
Dynamic control.Therefore, the control of mechanical means fluid flow and heat transfer is substituted using the magnetic field of external permanent magnet offer, together
When magnet can be located on the outside of fluid mass realize it is non-contact with fluid, thus its not only with no flow dead zone, system simply,
Implement and convenient disassembly, it is at low cost the features such as, and it is aobvious with being applicable in occasions such as highly corrosive, local high heat flux density fluids
Write advantage.This non-contacting heat transfer and flow control method have great in fields such as such as crystal growth, metal casting, metallurgy
Meaning.
The permanent magnet group that external magnetic field is generated in the present embodiment is placed in fluid control zone both sides, can change as needed
Become magnet shape.
External permanent magnet group in the present embodiment can increase or reduce as needed group of magnets number.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (7)
1. a kind of contactless flowing and heat transfer control device, it is characterised in that：Including several groups permanent magnet group, the permanent magnet
Group includes South Pole magnet and North magnet, and the South Pole magnet and North magnet are symmetrically distributed in the both sides of fluid mass so that
Magnetic field is full of inside fluid mass, the distance between the South Pole magnet and North magnet are greater than or equal to 1.5 times of fluid width
And it is less than or equal to 3 times of fluid width.
2. the contactless control device that flows and conduct heat of one kind according to claim 1, it is characterised in that：The antarctic magnetism
Line and fluid flow direction between iron and North magnet midpoint is perpendicular.
3. the contactless control device that flows and conduct heat of one kind according to claim 1, it is characterised in that：The antarctic magnetism
The spatial position of iron and North magnet is arranged symmetrically about fluid mass.
4. the contactless control device that flows and conduct heat of one kind according to claim 1, it is characterised in that：The antarctic magnetism
Iron and North magnet shape, size all same.
5. the contactless control device that flows and conduct heat of one kind according to claim 1, it is characterised in that：The antarctic magnetism
The shape of iron and North magnet is cuboid, cylinder or sphere.
6. a kind of contactless flowing and heat transfer control method, it is characterised in that：Include the following steps：
1) fluid mass and shape are determined；
2) take at least one set of permanent magnet group, by the South Pole magnet and North magnet of permanent magnet group it is symmetrically placed it is left in fluid mass,
Right both sides make fluid mass be full of magnetic field, and the distance between adjust South Pole magnet and North magnet and adjust magnetic in fluid mass
The size of field intensity, magnetic field generate the Lorentz force opposite with flow direction in fluid, are flowed to conductor fluid to realize
With heat transfer Untouched control.
7. the contactless control method that flows and conduct heat of one kind according to claim 6, it is characterised in that：The step 2)
The size of middle magnetic field intensity is greater than or equal to 0.5T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810970285.XA CN108733089A (en) | 2018-08-24 | 2018-08-24 | A kind of contactless flowing and conduct heat control method and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810970285.XA CN108733089A (en) | 2018-08-24 | 2018-08-24 | A kind of contactless flowing and conduct heat control method and its device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108733089A true CN108733089A (en) | 2018-11-02 |
Family
ID=63943127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810970285.XA Pending CN108733089A (en) | 2018-08-24 | 2018-08-24 | A kind of contactless flowing and conduct heat control method and its device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108733089A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW470835B (en) * | 2000-12-01 | 2002-01-01 | Ind Tech Res Inst | Electromagnetic type control valve for conductive fluids |
| CN101454918A (en) * | 2006-04-14 | 2009-06-10 | 昭和电工株式会社 | Method of controlling adjusting hole |
| WO2011054393A1 (en) * | 2009-11-06 | 2011-05-12 | Fundacion Fatronik | Device and method for fixing parts |
| CN102368938A (en) * | 2010-03-16 | 2012-03-07 | 许圣烈 | Showerhead having an ionizer |
| CN103791764A (en) * | 2014-01-27 | 2014-05-14 | 南京航空航天大学 | Heat exchange enhancement method and device for non-contact vortex generator |
| CN106593831A (en) * | 2015-10-19 | 2017-04-26 | 中国科学院理化技术研究所 | Non-contact electromagnetic micropump device |
| CN106767084A (en) * | 2016-12-01 | 2017-05-31 | 中国船舶重工集团公司第七〇九研究所 | A kind of contactless fluid-mixing strengthened heat exchange method and heat-exchanger rig |
| US20170298966A1 (en) * | 2016-04-14 | 2017-10-19 | Los Alamos National Security, Llc | Magnetically controlled valve and pump devices and methods of using the same |
| CN107774971A (en) * | 2017-10-20 | 2018-03-09 | 东北大学 | A kind of continuous casting production by calutron control molten metal flowing |
| CN208432910U (en) * | 2018-08-24 | 2019-01-25 | 合肥锐联传热技术有限公司 | A kind of contactless flowing and the control device that conducts heat |
-
2018
- 2018-08-24 CN CN201810970285.XA patent/CN108733089A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW470835B (en) * | 2000-12-01 | 2002-01-01 | Ind Tech Res Inst | Electromagnetic type control valve for conductive fluids |
| CN101454918A (en) * | 2006-04-14 | 2009-06-10 | 昭和电工株式会社 | Method of controlling adjusting hole |
| WO2011054393A1 (en) * | 2009-11-06 | 2011-05-12 | Fundacion Fatronik | Device and method for fixing parts |
| CN102368938A (en) * | 2010-03-16 | 2012-03-07 | 许圣烈 | Showerhead having an ionizer |
| CN103791764A (en) * | 2014-01-27 | 2014-05-14 | 南京航空航天大学 | Heat exchange enhancement method and device for non-contact vortex generator |
| CN106593831A (en) * | 2015-10-19 | 2017-04-26 | 中国科学院理化技术研究所 | Non-contact electromagnetic micropump device |
| US20170298966A1 (en) * | 2016-04-14 | 2017-10-19 | Los Alamos National Security, Llc | Magnetically controlled valve and pump devices and methods of using the same |
| CN106767084A (en) * | 2016-12-01 | 2017-05-31 | 中国船舶重工集团公司第七〇九研究所 | A kind of contactless fluid-mixing strengthened heat exchange method and heat-exchanger rig |
| CN107774971A (en) * | 2017-10-20 | 2018-03-09 | 东北大学 | A kind of continuous casting production by calutron control molten metal flowing |
| CN208432910U (en) * | 2018-08-24 | 2019-01-25 | 合肥锐联传热技术有限公司 | A kind of contactless flowing and the control device that conducts heat |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gillon | Uses of intense dc magnetic fields in materials processing | |
| Zhang et al. | Macro segregation formation mechanism of the primary silicon phase in directionally solidified Al–Si hypereutectic alloys under the impact of electric currents | |
| Liu et al. | Transient motion of inclusion cluster in vertical-bending continuous casting caster considering heat transfer and solidification | |
| KR20210107902A (en) | Single crystal pulling device and single crystal pulling method | |
| CN207642259U (en) | A kind of high pulling rate equilibrium efficient heat transfer crystallizer copper pipe | |
| Yanovskii et al. | On the influence of the magnetic field upon hydrogasdynamic processes in a boiling magnetic fluid | |
| Wang et al. | Progress on high magnetic field-controlled transport phenomena and their effects on solidification microstructure | |
| Kaneda et al. | Heat transfer enhancement by external magnetic field for paramagnetic laminar pipe flow | |
| CN208432910U (en) | A kind of contactless flowing and the control device that conducts heat | |
| Daggolu et al. | Analysis of the effect of symmetric/asymmetric CUSP magnetic fields on melt/crystal interface during Czochralski silicon growth | |
| CN108733089A (en) | A kind of contactless flowing and conduct heat control method and its device | |
| WO2017199536A1 (en) | Single crystal pulling device and single crystal pulling method | |
| Zhang et al. | Modelling of coupling flow and temperature fields in molten pool during twin-roll strip casting process | |
| Tian et al. | Numerical analysis of coupled fluid flow, heat transfer and macroscopic solidification in the thin slab funnel shape mold with a new type EMBr | |
| Kaneda et al. | Natural convection of paramagnetic fluid along a vertical heated wall under a magnetic field from a single permanent magnet | |
| US2890940A (en) | Electromagnetic stirring method | |
| Siraev et al. | LIQUID METAL EXPOSED TO ROTATING AND TRAVELLING MAGNETIC FIELDS IN CRUCIBLES WITH CIRCULAR AND SQUARE CROSS-SECTIONS. | |
| JP7160006B2 (en) | Single crystal pulling apparatus and single crystal pulling method | |
| Hassaan et al. | Simulation of the superconducting magnet for a silicon single crystal growth | |
| JP7230781B2 (en) | Single crystal pulling apparatus and single crystal pulling method | |
| Fan et al. | Effects of thermocapillary convection and shear flow on the distribution of inclusions in half-floating zones | |
| Niu et al. | Effects of Eccentric Mold Electromagnetic Stirring on Continuous Casting Large Steel Round Blooms | |
| Yang et al. | The effect of uniform magnetic field on spatial-temporal evolution of thermocapillary convection with the silicon oil based ferrofluid | |
| Yang et al. | Melt motion during liquid-encapsulated Czochralski crystal growth in steady and rotating magnetic fields | |
| Lee et al. | Flow flattening in continuous casting mold by electromagnetic effects |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |