You can improve your approach significantly as follows. The grid is not refined adequately, and in a simple geometry like this, a hex mesh is much better, or an assembly meshing approach (eg. Mosaic). Correct to use a Reynolds Stress Turbulence model for RANS simulation. Start from a Hybrid initialization using the expected pressure drop on the vortex finder outlet - activating More Settings -> use specified pressure on inlets. Then converge the problem using a coupled steady state simulation. Typically the residuals to not actually converge, and flatline. Once no further residual development happens, stop and swap to transient analysis and restart the simulation. It is not correct to only allow 3 transient steps. The solution is far from fully developed and will require simulation typically for one residence time (Volume cyclone/Volumetric feed rate) to develop the transient flow field. This requires many transient steps.
It is a very good tutorial. I have a question, At the patch and at the end solid is shown but nowhere at the beginning you defined the solid , except you defined properties such as density and viscosity values but you left it as air without changing to solid, when did you change/add solid as a component- Thanks
Yes you can apply that formulas for k epsilon also. But for complex flow you have to use rsm. Nowadays reviewers are not accepted k epsilon for complex flow. They are suggesting rsm for complex flow.
Thank you, you are awesome! . Dear Sir, can you tell me in which chapter from the book ( chemical engineering design) can I find cyclonic filters? Another question if possible : Are all your calculations formulas are from the same book ? if yes , from wich chapter please? I am asking you because I will look for this book , it is useful Thank you very much
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You can improve your approach significantly as follows. The grid is not refined adequately, and in a simple geometry like this, a hex mesh is much better, or an assembly meshing approach (eg. Mosaic). Correct to use a Reynolds Stress Turbulence model for RANS simulation. Start from a Hybrid initialization using the expected pressure drop on the vortex finder outlet - activating More Settings -> use specified pressure on inlets. Then converge the problem using a coupled steady state simulation. Typically the residuals to not actually converge, and flatline. Once no further residual development happens, stop and swap to transient analysis and restart the simulation. It is not correct to only allow 3 transient steps. The solution is far from fully developed and will require simulation typically for one residence time (Volume cyclone/Volumetric feed rate) to develop the transient flow field. This requires many transient steps.
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It is a very good tutorial. I have a question, At the patch and at the end solid is shown but nowhere at the beginning you defined the solid , except you defined properties such as density and viscosity values but you left it as air without changing to solid, when did you change/add solid as a component- Thanks
How you determine value for H8 near the vortex finder?
are those theoretical formulas applicable for k- epsilon model as well?
Yes you can apply that formulas for k epsilon also. But for complex flow you have to use rsm. Nowadays reviewers are not accepted k epsilon for complex flow. They are suggesting rsm for complex flow.
Why did you patch...when you have already given initial conditions
Thank you, you are awesome! . Dear Sir, can you tell me in which chapter from the book ( chemical engineering design) can I find cyclonic filters?
Another question if possible : Are all your calculations formulas are from the same book ? if yes , from wich chapter please?
I am asking you because I will look for this book , it is useful
Thank you very much
any email id to contact you sir? Thank You for Your Work
venkatesme2014@gmail.com
Very bad nothing clear