Please someone tell me,What is the part of Mesh Model in CFD??I mean what part it has in CFD simulation.

Please someone tell me,What is the part of Mesh Model in CFD??I mean what part it has in CFD simulation.

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????????

Flow Sim only works with cubic hexahedral mesh. Fluid/solid boundaries are handled by partial cutcells within the hexahedrons.

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???????????

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.

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 3-5 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.

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

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.

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