CN110084419A - Automatic image realizes the initial method of refined net solution in a kind of CFD - Google Patents
Automatic image realizes the initial method of refined net solution in a kind of CFD Download PDFInfo
- Publication number
- CN110084419A CN110084419A CN201910320990.XA CN201910320990A CN110084419A CN 110084419 A CN110084419 A CN 110084419A CN 201910320990 A CN201910320990 A CN 201910320990A CN 110084419 A CN110084419 A CN 110084419A
- Authority
- CN
- China
- Prior art keywords
- refined net
- coarse grid
- solution
- grid
- cfd
- 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
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000005457 optimization Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
Landscapes
- Business, Economics & Management (AREA)
- Engineering & Computer Science (AREA)
- Economics (AREA)
- Strategic Management (AREA)
- General Business, Economics & Management (AREA)
- Human Resources & Organizations (AREA)
- Marketing (AREA)
- Finance (AREA)
- Development Economics (AREA)
- Physics & Mathematics (AREA)
- Accounting & Taxation (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Game Theory and Decision Science (AREA)
- Technology Law (AREA)
- Entrepreneurship & Innovation (AREA)
- Operations Research (AREA)
- Quality & Reliability (AREA)
- Tourism & Hospitality (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The present invention discloses the initial method that automatic image in a kind of CFD realizes refined net solution, the following steps are included: step S1: firstly the need of generation coarse grid and refined net, set coarse grid and refined net example, and coarse grid example is solved, after generating example can be arranged according to the operating condition of turbomachinery in grid, after example is set, need that CFD solver is called to solve coarse grid example；Step S2: next needs coarse grid example and refined net example while being loaded into calculator memory；Step S3: it finally needs for coarse grid solution to be transplanted on refined net.The present invention first generates coarse grid and obtains the true solution on coarse grid；Then it by the demapping of coarse grid to the refined net really used, is thus solved as the initial solution of refined net.The process may be implemented increasingly automated.Compared with prior art, (1) provides and is more nearly the initial solution really solved, to accelerate solver convergence rate；(2) whole process is increasingly automated.
Description
Technical field
The present invention relates to Fluid Mechanics Computation technical fields, and specifically automatic image realizes refined net in a kind of CFD
The initial method of solution.
Background technique
Contract for differences can reflect the price change of stock or index and provide profit or loss brought by price change,
And it need not actually hold stock or index futures.Contract for differences CFD margin trading transaction, it is the same with stock barter,
Profit or loss are determined by your current bid and ask prices, and contract for differences CFD has very with respect to traditional equity barter
More advantages.The prior art is thicker using equality initialization or mixing initialization, the initial solution of generation for mainstream CFD software
It is rough, solver convergence rate is influenced, this is based on, needs to design the initialization side that automatic image in a kind of CFD realizes refined net solution
Method, to solve the above problems.
Summary of the invention
The purpose of the present invention is to solve initial solution in the prior art and true solution gap are larger to influence solver
The defect of convergence rate provides automatic image in a kind of CFD and realizes the initial method of refined net solution to solve the above problems.
To achieve the goals above, technical scheme is as follows:
Automatic image realizes the initial method of refined net solution in a kind of CFD, it is characterised in that: the following steps are included:
Step S1: firstly the need of coarse grid and refined net is generated, coarse grid and refined net example are set, and calculate coarse grid
Example is solved, and after generating example can be arranged according to the operating condition of turbomachinery in grid, after example is set, needs to call
CFD solver solves coarse grid example；
Step S2: next needs coarse grid example and refined net example while being loaded into calculator memory；
Step S3: it finally needs for coarse grid solution to be transplanted on refined net.
Preferably, coarse grid described in above-mentioned steps S2 and refined net are existed simultaneously in memory, and can freely cut
It changes.
Can be divided into two steps preferably, coarse grid solution is transplanted on refined net described in above-mentioned steps S3: the first step needs
It to be matched between coarse grid and refined net, to generate the unit in refined net in coarse grid corresponding to each unit
Group；Second step is the initial solution for generating each unit in refined net, is specifically carried out by the unit group in its corresponding coarse grid
Weighted calculation.
Preferably, the first step takes the search of optimization to match, so that the time cost of the step is saved, so that
The completion of whole process more efficient quick.
Automatic image realizes the initial method of refined net solution in a kind of CFD of the invention, first generates coarse grid and obtains
True solution on coarse grid；Then by the demapping of coarse grid to the refined net really used, thus as refined net just
Beginning solution is solved.The process may be implemented increasingly automated.Compared with prior art, (1) provides to be more nearly and really solve
Initial solution, to accelerate solver convergence rate；(2) whole process is increasingly automated.
Specific embodiment
The effect of to make to structure feature of the invention and being reached, has a better understanding and awareness, to preferable
Embodiment cooperation detailed description, is described as follows:
Embodiment 1
Automatic image realizes the initial method of refined net solution in a kind of CFD, includes the following steps:
Firstly the need of coarse grid and refined net is generated, coarse grid and refined net example are set, and carry out to coarse grid example
It solves, TurboTides software platform has the grid generation module for turbomachinery height optimization.The grid is generated
Module, adjustable series of parameters is to generate the grid met the requirements；But it in most cases only needs to select grid fine
Level can generate the grid of high quality, and after generating example can be arranged according to the operating condition of turbomachinery in grid, and example is set
It after setting, needs that CFD solver is called to solve coarse grid example, the CFD of TurboTides software platform solves utensil
There is the characteristics of high stability, high precision and fast convergence, therefore can easily generate reliable coarse grid solution；
Next needs coarse grid example and refined net example while being loaded into calculator memory, TurboTides software platform tool
There is a function that can read in multiple examples simultaneously, which is coarse grid and refined net is existed simultaneously in memory and free switching mentions
Convenience has been supplied, in addition, TurboTides software platform has the data structure of unified intercommunication, two examples correspond to two objects,
The information such as the solution on transmitting grid and grid that therefore can be convenient；
Finally need for coarse grid solution to be transplanted on refined net, this is divided into two steps: the first step need coarse grid and refined net it
Between matched, to generate the unit group in refined net in coarse grid corresponding to each unit；Second step is to generate fine-structure mesh
The initial solution of each unit in lattice is specifically weighted by the unit group in its corresponding coarse grid, and the first step is taken
The search of optimization matches, so that the time cost of the step is saved, so that the completion of whole process more efficient quick.
In conclusion automatic image realizes the initial method of refined net solution in a kind of CFD of the invention, coarse net is first generated
Lattice simultaneously obtain the true solution on coarse grid；Then it by the demapping of coarse grid to the refined net really used, is thus used as thin
The initial solution of grid is solved.The process may be implemented increasingly automated.Compared with prior art, (1) provides and is more nearly
The initial solution really solved, to accelerate solver convergence rate；(2) whole process is increasingly automated.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its
Equivalent defines.
Claims (4)
1. automatic image realizes the initial method of refined net solution in a kind of CFD, it is characterised in that: the following steps are included:
Step S1: firstly the need of coarse grid and refined net is generated, coarse grid and refined net example are set, and calculate coarse grid
Example is solved, and after generating example can be arranged according to the operating condition of turbomachinery in grid, after example is set, needs to call
CFD solver solves coarse grid example；
Step S2: next needs coarse grid example and refined net example while being loaded into calculator memory；
Step S3: it finally needs for coarse grid solution to be transplanted on refined net.
2. automatic image realizes the initial method of refined net solution in a kind of CFD according to claim 1, feature exists
In: coarse grid described in above-mentioned steps S2 and refined net are existed simultaneously in memory, and can be with free switching.
3. automatic image realizes the initial method of refined net solution in a kind of CFD according to claim 1, feature exists
In: coarse grid solution, which is transplanted on refined net, described in above-mentioned steps S3 can be divided into two steps: first step needs are in coarse grid and carefully
It is matched between grid, to generate the unit group in refined net in coarse grid corresponding to each unit；Second step is to produce
The initial solution of each unit in raw refined net, is specifically weighted by the unit group in its corresponding coarse grid.
4. automatic image realizes the initial method of refined net solution in a kind of CFD according to claim 3, feature exists
In: the first step takes the search of optimization to match, so that the time cost of the step is saved, so that the completion of whole process
More efficient quick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910320990.XA CN110084419A (en) | 2019-04-21 | 2019-04-21 | Automatic image realizes the initial method of refined net solution in a kind of CFD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910320990.XA CN110084419A (en) | 2019-04-21 | 2019-04-21 | Automatic image realizes the initial method of refined net solution in a kind of CFD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110084419A true CN110084419A (en) | 2019-08-02 |
Family
ID=67415812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910320990.XA Pending CN110084419A (en) | 2019-04-21 | 2019-04-21 | Automatic image realizes the initial method of refined net solution in a kind of CFD |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110084419A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113392602A (en) * | 2021-07-14 | 2021-09-14 | 中国空气动力研究与发展中心计算空气动力研究所 | Interface data structure of CFD standard pneumatic example and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5608405A (en) * | 1995-10-06 | 1997-03-04 | Lockheed Martin Corporation | Method of generating visual representation of terrain height from SAR data employing multigrid analysis |
| US20070157133A1 (en) * | 2003-05-30 | 2007-07-05 | Chung-Kuan Cheng | Circuit network analysis using algebraic multigrid approach |
| CN108595788A (en) * | 2018-04-05 | 2018-09-28 | 西北工业大学 | A kind of flow field Accelerated Convergence Method based on mode multi grid |
-
2019
- 2019-04-21 CN CN201910320990.XA patent/CN110084419A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5608405A (en) * | 1995-10-06 | 1997-03-04 | Lockheed Martin Corporation | Method of generating visual representation of terrain height from SAR data employing multigrid analysis |
| US20070157133A1 (en) * | 2003-05-30 | 2007-07-05 | Chung-Kuan Cheng | Circuit network analysis using algebraic multigrid approach |
| CN108595788A (en) * | 2018-04-05 | 2018-09-28 | 西北工业大学 | A kind of flow field Accelerated Convergence Method based on mode multi grid |
Non-Patent Citations (3)
| Title |
|---|
| 彭文启 等: "三维N-S方程混合有限分析多重网格方法", 《水科学进展》 * |
| 薛斌党 等: "完全多重网格法求解光强度传播方程的相位恢复方法", 《光学学报》 * |
| 陈文斌 等, 湖南科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113392602A (en) * | 2021-07-14 | 2021-09-14 | 中国空气动力研究与发展中心计算空气动力研究所 | Interface data structure of CFD standard pneumatic example and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tran | The middle-income trap: Issues for members of the Association of Southeast Asian Nations | |
| Kitson et al. | The deindustrial revolution: the rise and fall of UK manufacturing, 1870-2010 | |
| Rodrik | Structural change, fundamentals, and growth: an overview | |
| Daher et al. | Microfinance and financial performance | |
| Holz | The unbalanced growth hypothesis and the role of the state: The case of China's state-owned enterprises | |
| Siraj | Official development assistance (ODA), public spending and economic growth in Ethiopia | |
| US20150287139A1 (en) | Financial product trade managing apparatus, financial product trade managing system, financial product trade managing method, and program storage medium | |
| CN107133289A (en) | A kind of method and apparatus of determination commercial circle | |
| CN112052385A (en) | Investment and financing project recommendation method and device, electronic equipment and readable storage medium | |
| Azenui et al. | Labor productivity growth in sub-Sahara African LDCs: sectoral contributions and macroeconomic factors | |
| AWOYEMI et al. | Agricultural productivity and economic growth: Impact analysis from Nigeria | |
| CN110084419A (en) | Automatic image realizes the initial method of refined net solution in a kind of CFD | |
| US20150186816A1 (en) | System and method for assessing sustainability of overseas gas field | |
| Engle | The risk that risk will change | |
| Majumder | Productivity growth in small enterprises-role of inputs, technological progress and'learning by doing' | |
| CN113379464B (en) | Block chain-based site selection method, device, equipment and storage medium | |
| Harrasova | Estimating the elasticity of substitution between capital and labour | |
| Benk et al. | US volatility cycles of output and inflation, 1919-2004: A money and banking approach to a puzzle | |
| KR20220027606A (en) | Method for predicting default rates for each macro-scenario | |
| CN109636088A (en) | It is a kind of for assessing the method and device of Inter-Bank Market mobility | |
| Knittel et al. | The Pass-Through of RIN Prices to Wholesale and Retail Fuels under the Renewable Fuel Standard: Analysis of Post-March 2015 Data | |
| Acquah et al. | Impact of Global Value Chain on Economic Growth: Evidence from Belt and Road Initiatives | |
| Le | Does state ownership matter to stock returns? | |
| Ghibutiu | The changing landscape of international trade | |
| JP2009187061A (en) | Credit evaluation processing system, credit evaluation processing method and credit evaluation processing program |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190802 |