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how to add a turbulence into a laminar model? |
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#1 |
New Member
Matthew
Join Date: Aug 2017
Posts: 28
Rep Power: 9 ![]() |
Hi, I have done a simple model of using a velocity at the inlet, to achieve a laminar flow passing through a pipe. The solver is icoFoam. Now I would like to change to a turbulent flow without using any turbulence model (actually I would like to do the DNS). How to modify the boundary conditions to achieve a turbulence?
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#2 |
Member
ano
Join Date: Jan 2017
Location: Delft
Posts: 58
Rep Power: 10 ![]() |
Hi Matthew,
to turn laminar flow turbulent you have to give some noise as initial condition. To maintain a turbulent flow in a pipe you have to use periodic boundary conditions (and a function object, which imposes a pressure gradient onto your pipe, so that the mean flow rate is steady).
Last edited by ano; September 10, 2017 at 07:53. |
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#3 |
Senior Member
Jianrui Zeng
Join Date: May 2018
Location: China
Posts: 157
Rep Power: 8 ![]() |
Hello Matthew,
Have you resolved your problem?I am doing similar research on DNS of heated pipe flow. Any hint or guide is appreciated. Thank you. |
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