|January 3, 2014, 01:24||
conjugate heate transfer: thermophysical properties
Join Date: Nov 2013
Posts: 86Rep Power: 4
I'm trying to simulate conjugate heat transfer in a simple heat exchanger using chtMultiRegionSimpleFoam. I have a water flowing between heated metallic plates. I was able to set up a case based on examples multiRegionHeater and planeWall2D. In these examples air with perfectGas equation of state is used. When I run it with air, the results look ok, at least qualitatively.
However, I would like to use water instead of air, and perfectGas equation of state can't be used.
I tried to use file thermophysicalProperties from the
/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionLiquidHeater/constant/bottomWater/thermophysicalProperties (which is for transient solver)
instead of the file with air properties, I also changed density limits in the system/fluidDomain/fvSolution.SIMPLE. With this changes I was able to run my case, however the results are not correct. The fluid domain doesn't get heated. The temperature increases only on the boundaries of the fluid domain, inside fluid domain temperature does not change. There is something wrong with my definition of fluid, looks like there is no heat conduction inside fluid.
I wonder if anyone can explain me what do I do if I want to use water instead of air?
Can I use water properties from
/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionLiquidHeater/constant/bottomWater/thermophysicalProperties (which is for transient solver)?
If yes, what else I should change in my case?
It would be great if someone can give me a working example of using chtMultiRegionSimpleFoam with water or any other liquid, not gas.
|May 21, 2015, 18:24||
Join Date: Mar 2014
Location: UK, Reading
Posts: 95Rep Power: 4
you have for the fluid
transport const; thermo hConst; equationOfState rhoConst;
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|June 1, 2015, 13:08||
Join Date: Sep 2013
Location: Madrid, Spain
Posts: 39Rep Power: 4
Thank you. However, I don't understand why in this file /tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/constant/bottomWater/thermophysicalProperties the same entries valid for air are used.
Should I use icoPolynomial equation of state? It is the only one suggested in case of operating with a liquid.
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