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chtMultiRegionSimpleFoam for forced convection. |
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#1 |
Senior Member
Mandeep Shetty
Join Date: Apr 2016
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Hello,
I have read that chtMultiRegionSimpleFoam is a blend of buoyantsimplefoam and laplacefoam. I don't see any problem...but still wanted to confirm this can be used for forced convection as well as natural convection problem? Also, is there a blend of rhosimplefoam and laplacefoam? |
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#2 |
Senior Member
Uwe Pilz
Join Date: Feb 2017
Location: Leipzig, Germany
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I experimented with buoyantsimplefoam a while ago. Results for free convection are great and agreed with theoretical results.
I was never happy with combination of forced and free convection. Mosty, at some edge a region of unnatural high velocity occurred which captured all of the region until the case exploded. My be, another combination of schemes and solvers, together with relaxation may cure this. All in all I felt it is not a stable case for this solver.
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Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950) |
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#3 | |
Senior Member
Mandeep Shetty
Join Date: Apr 2016
Posts: 185
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Quote:
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#4 |
Senior Member
Uwe Pilz
Join Date: Feb 2017
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The most used and most time-tested solver is pimpleFoam. But you cannot take free convection into account with that.
I solution could be that you run two simulations and decide which type of convection influences the boundary layer most. There are some regions, of course, where both appear. You have to think about a method of blending them.
__________________
Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950) |
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#5 | |
Senior Member
Mandeep Shetty
Join Date: Apr 2016
Posts: 185
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