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Free Convection using chtMultiRegionFoam - wrong results |
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May 23, 2016, 02:25 |
Free Convection using chtMultiRegionFoam - wrong results
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#1 |
Senior Member
Peter Hess
Join Date: Apr 2011
Location: Austria
Posts: 250
Rep Power: 17 |
Hello everybody!
During my training process to use openFoam I work now on free convection simulation using chtMultiRegionFoam... For this target I built a mesh from two regions a solid region and a fluid one. The solid region contains a heat source programed in fvOptions file in the solid region constant dictionary. The fluid region is a prefect gas air assumed... No radiation (turned of). And no turbulence (laminar), to make the calculation easier... The mesh has been generated using Ansys Mesher and have very high quality. - Import made using: fluent3DMeshToFoam Test2.msh! - The one region imported is splited to two regions using: splitMeshRegions -cellZones -overwrite - The simulation is splited on two cores using: decomposePar -allRegions The geometry contains 6 sides, three of them are symmetrical defined. The upper, lower and back sides are constant temperature 300 K The contact between solid and fluid is correctly defined (I suppose). The gravity is defined in Z direction. To run the simulation simply fire the Allrun file included. The running is in parallel on two cores. - you can also run using: mpirun -np 2 chtMultiRegionFoam -parallel Just the last result has been shown here to reduce the size of uploaded file! Problem: At the surrounding walls (upper, lower and back sides), the density of air is about 0.75 and should be theoretically 1.1881 I have no idea why is that happens. Any idea is welcome Regards Peter PS: changing to chtMultiRegionSimpleFoam brought also wrong results |
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May 23, 2016, 02:34 |
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#2 |
Senior Member
Peter Hess
Join Date: Apr 2011
Location: Austria
Posts: 250
Rep Power: 17 |
sorry! the file is too big for CFDOnline. I will manage it and repost...
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