# LES rotating pipe swak4foam

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 August 3, 2013, 03:10 LES rotating pipe swak4foam #1 New Member   Simon Emhardt Join Date: Feb 2013 Posts: 9 Rep Power: 4 hi, I am using pisoFOAM with LES turbulence model to simulate a fully turbulent pipe flow with Re=7000 based on the centreline velocity. (non-rotating pipe, mapping method) The pipe is fully 3D and the dimensions are L=5D. I initialised the field with some turbulence using perturbU. after 10 flow through times it's fully developed. now i want to write out the time dependent velocity profile and put it in as inlet condition when i start a new calculation with a rotating pipe. i found some threads about swake4foam but couldn't figured it out. i'm using openfoam-2.2.0. any ideas how to put in the inlet a non-uniform time-dependent velocity profile? thanks in advance simon

August 3, 2013, 13:07
#2
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Bernhard Gschaider
Join Date: Mar 2009
Posts: 3,915
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Quote:
 Originally Posted by Gosi hi, I am using pisoFOAM with LES turbulence model to simulate a fully turbulent pipe flow with Re=7000 based on the centreline velocity. (non-rotating pipe, mapping method) The pipe is fully 3D and the dimensions are L=5D. I initialised the field with some turbulence using perturbU. after 10 flow through times it's fully developed. now i want to write out the time dependent velocity profile and put it in as inlet condition when i start a new calculation with a rotating pipe. i found some threads about swake4foam but couldn't figured it out. i'm using openfoam-2.2.0. any ideas how to put in the inlet a non-uniform time-dependent velocity profile? thanks in advance simon
swak currently only does lookup-tables by one variable (either time or another). But timeVaryingMappedFixedValue might be your friend.
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August 6, 2013, 20:15
#3
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Simon Emhardt
Join Date: Feb 2013
Posts: 9
Rep Power: 4
Quote:
 Originally Posted by gschaider swak currently only does lookup-tables by one variable (either time or another). But timeVaryingMappedFixedValue might be your friend.
thanks a lot for your quick response. that's what i need.

simon

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