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Old   December 27, 2014, 18:37
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Anwar
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In Ansys Fluent, How can i use roughness inside pipe in my setup (also what is the used Model) ?
Secondly, If i want to start roughness after a distance from the inlet of the pipe -not from inlet directly- how can i do that ?
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Old   December 28, 2014, 11:49
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Check options in boundary conditions for all the walls; you can set roughness heigh and roughness constant (these parameters refer to sand grain roughness).
If you want to start roughness after some smooth pipe you need to create 2 different walls and set their roughnesses appropriately.
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Old   December 29, 2014, 21:59
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All thanks senior member "ghost82" , can i ask you how can i do that step of splitting wall into two walls ?. is it firstly in geometry , also how can i do ?
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