Good references for above.
N.C.Markatos Computational Fluid Flow Capabilities and Software,Ironmaking and Steelmaking,Vol 16,No4,p266-273,1989
Mathematical modelling of single and two-phase flow problems in the process industries,Revue de l"Institut Francais du Petrole,vol 48,no 6,p631-662,1993
Dynamic Computer Modelling of Environmental Systems......
Asia-Pacific J.of Chem.Engineering,7(2),p182-205,2012
I think the issue is same as in other applications.
Typically, we must define the effective grid size before we carry out CFD simulation. The effective grid size means it is small enough to minimize errors from dissipation due to grid and big enough to save computing source. In turbomachinery, grid size near blade tip, shroud, leading edge and trailing edge is very sensitive to the results. To get a reliable simulation results, grid convergence study should be performed prior to looking deep into flow.
Best,
Wei
Yes Yang you are right. Do we have any relation that defines the grid Independence for turbo machines case.
Grid Sensitivity refers to all CFD computations not only turbomachines.No solution should be accepted unless it is grid independent.This means that a computer run is repeated with finer and finer grids until the results at all points in space do not change anymore.The grids required vary according to the case but for turbomachines with strong turbulence you will need 800000-1000000 nodes.
Good references for above.
N.C.Markatos Computational Fluid Flow Capabilities and Software,Ironmaking and Steelmaking,Vol 16,No4,p266-273,1989
Mathematical modelling of single and two-phase flow problems in the process industries,Revue de l"Institut Francais du Petrole,vol 48,no 6,p631-662,1993
Dynamic Computer Modelling of Environmental Systems......
Asia-Pacific J.of Chem.Engineering,7(2),p182-205,2012
Hi Chetan, the grid sensitivity study is same as obtaining grid independent solution. This is done by solving your flow problem on a sequence of consistently refind grid to show that the solution you are presenting will not change (or change very little) with further mesh refinements. Of course, this is true for all flow modeling not only turbomachienry
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