
Re: Please someone tell me,What is the part of Mesh Model in CFD??
Gareth Knopp Mar 2, 2015 5:25 AM (in response to Sourabh Jadhav)Hi,
It is the Finite element section if you like, the bits where the calculation boundaries are. Rule of thumb is to size it so you have 5 Cells across an open passage. Too many cells and the calculation will take decades, too few and the results are rubbish. The art is selecting the correct size for the overall model then adding mesh controls around the small features that you think are important.  Depending on what you size of products you design you can scale the main mesh accordingly. I try to keep it around 2million cells.
Gareth

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Jared Conway Mar 3, 2015 8:35 PM (in response to Sourabh Jadhav)can you rephrase the question?
are you asking what version of solidworks has flow?

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Sourabh Jadhav Mar 4, 2015 2:11 AM (in response to Sourabh Jadhav)What is the use of Mesh model in CFD.How it works????

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Jared Conway Mar 5, 2015 2:30 AM (in response to Sourabh Jadhav)I don't know what you're asking
flow simulation is a finite volume cfd solver
it solves the navier stokes equation
it uses the KE turbulence model
there are a lot of great whitepapers and a great technical document that goes along with the software that would probably answer all of your questions


Re: Please someone tell me,What is the part of Mesh Model in CFD??
Sourabh Jadhav Mar 5, 2015 3:39 AM (in response to Sourabh Jadhav)Please suggest some websites or any link, so that i can find ans of my questions..& about question ........do we get some options like tetrahedral or octagonal mesh while performimg CFD in mesh model & what is exactly mesh model???I am considering it as 3.what if we take 4,5,6.& does it take any default shape like tetragonal or octagonal mesh????????

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Dave Laban Mar 5, 2015 5:02 AM (in response to Sourabh Jadhav)Flow Sim only works with cubic hexahedral mesh. Fluid/solid boundaries are handled by partial cutcells within the hexahedrons.

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Sourabh Jadhav Mar 7, 2015 1:06 AM (in response to Dave Laban)What is Mesh Model???What is the use of it in CFD????& its default value is 3 ,What if i take it 4 or 5???????????

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Dave Laban Mar 9, 2015 4:13 AM (in response to Sourabh Jadhav)The mesh defines the computation space. It is how the solver is made to understand what shape geometry you are trying to flow through.
If you set the mesh to four, five or higher, this increases the mesh density. Put simply, this will give a more accurate representation of your geometry, at the cost of taking longer to solve.

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Andrei Popov Mar 10, 2015 12:52 AM (in response to Sourabh Jadhav)4 Meshing and Thin Wall Optimization 2 What is an Initial Mesh  YouTube
4 Meshing and Thin Wall Optimization 3 Thin Walls and Minimum Gap Size  YouTube
SOLIDWORKS Flow Simulation  Mesh Controls  YouTube
When you mesh the initial mesh using manual settings you select the size of your domain and the size or the number of cells in each direction. Let's say this base cell dimension is D.(what follows applies in all three dimensions Dx,Dy,Dz).
Then you select the smallest gap or cell dimension which is d. Anyway in your smallest gap you should have at least 35 cells but you can have only one if you really want that.
THen you set that number which is a mystery what it does, but if you select 1 the smallest cell will be D/2
IF you select 2 the smallest cell will be D/4
IF you select 3 the smallest cell will be D/8
so that number is the power of 2 of the divisons of the base cell into the smallest cells.
if you set n=3 AND
if your d is > D/2^3 then the smallest cell will be d, actually will be equal to D/2^n that is slightly larger than d And n<3 or whatever your number set.
if your d is < D/2^3 then the smallest cell will be D/8, so you would need to increase n so that the smallest cell you want to be > than D/2^n, which gets you in the first case.

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Jared Conway Mar 10, 2015 2:43 PM (in response to Sourabh Jadhav)this is old but it will tell you everything you want
https://d2t1xqejof9utc.cloudfront.net/files/18565/SW_CFD_technical_reference.pdf?1361897013
it is the technical reference for flow
there is also a solving engineering problems document that goes into other practical answers
i'm not sure what the context of your questions is but getting this deep too early can take you down some bad paths
i'd recommend getting started with some reseller training on how the software works and then dig deeper later

Re: Please someone tell me,What is the part of Mesh Model in CFD??
Andrei Popov Mar 11, 2015 3:13 PM (in response to Jared Conway)If people would know they have all the documentation they need in this folder where Flow Simulation is installed, they wouldn't ask obvious questions on forums.
C:\Program Files\SolidWorks Corp\SolidWorks Flow Simulation\lang\english\Docs
Also you have the same docs in the Help menu > Solidworks Flow Simulation > Technical Reference and Tutorials docs
Anyway this question of what that number represents took me some time to figure it out even after reading all the available documentation.





Re: Please someone tell me,What is the part of Mesh Model in CFD??
Seckin Uslu Mar 9, 2015 7:25 AM (in response to Sourabh Jadhav)Google play store flow sim