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boussineSimpleFoam, inlet/outlet and timestep errors - humanbody case

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Old   August 12, 2014, 08:55
Default boussineSimpleFoam, inlet/outlet and timestep errors - humanbody case
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apologies for the length of this post but I need to make sure I get answers and the questions are understood properly. I am using boussinesqSimpleFoam solver for a human body with 100watts heatflux in a cube domain with inlet and outlet points overhead. Firstly, I have been having issues assigning appropriate inlet and outlet boundary conditions, inlet 0.4m/s – I have managed to get results for when 0/U inlet patch is fixed value and 0/U outlet patch is zerogradient and 0/p inlet is zeroGradient and 0/p outlet is calculated – however because of the zeroGradient bc as the solution continues the velocity at outlet reaches an unrealistic value, I am trying to replicate overhead and air conditioning
So, what inlet and outlet conditions do I need to have , I have tried to use flowRateVelocityInlet as well as inletOutlet but am unsure how to properly impose them.
I also expexted to see a thermal plume but one is not present...
Also my timestep errors seem to be growing – which is a concern – again I believe this to be due to the improper inlet and outlet boundary conditions
please see attached for some better understanding
also 0 file:
thank a lot
Attached Images
File Type: jpg Uinletoutlet.jpg (48.4 KB, 11 views)
File Type: jpg inletoutlet10sU.jpg (49.3 KB, 8 views)
File Type: jpg Tinletoutlet.jpg (48.8 KB, 7 views)

Last edited by eaglemckenna; August 12, 2014 at 10:43.
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Old   August 13, 2014, 05:00
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Joachim Herb
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For the use of inletOutlet boundary condition have a look for the tutorial in incompressible/pimpleFoam/TJunction

If you are looking for a tutorial with a special boundary condition use these commands:
find . -type f | grep -E "/0.*/" | xargs grep "inletOutlet" | less
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