Hello,
I have been trying to model the flow over a hollow cylinder (diameter = 24 mm) on ANSYS Fluent. Now most publications I come upon seems to work in a much lower Reynolds number range (below 300). However, my particular research application has application in a Reynolds number ranging from 20,000 to 40,000. Now I need to know which viscous model do I need to select so that it is properly able to produce result for my application (like SST k-omega and so on). Also, an expert on this topic can also help me with the parameters associated with the viscosity model that needs to be given input. Thank you.
As far I know, the type of the viscous model does not affect significantly on the process, but you can verify this if it is mentioned in the ansys guide.
Hi Muhammad Abu Sufian ,
It's better to use the SST k-omega turbulence model and keep the y+ around 1. Also, the grid at the behind of the cylinder should be fine enough. If the simulation has a convergence problem, you can choose the coupled scheme. Use second-order implicit transient formulation and calculate the time step through strouhal number.
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