[enr_venkat@yahoo.com]

Hello All,


We are working on an Electric Vehicle Traction Cooling System (TCS). Accurate modeling of water pump is crucial in addition to the heat sources. Unfortunately we would not be able to get 3D CAD Model of the pump as it is a proprietary part.



How do we model the pump in such cases ? As an alternate workaround, we tried to model the pressure jump as in case of fan using ANSYS FLUENT. The solution diverged at the start of fan. However, i found few articles from ANSYS regarding the same to avoid divergence.


Is this approach applicable for Pump ? Since it's a positive displacement pump, the flow gets induced in a closed system whereas in case of Fan, the flow enters and exits on the other side which is open to fluid stream on both sides.


Any ideas and fairly accurate methods would be really helpful.

[DigiHctrGT]

Hi,

Is your simulation domain in 3D? I've had some experience with the pressure jump, and I must say I faced the same problems as you. What made the trick in my simulation was to use a moment source. Given the cross-sectional areas of the inlet and outlet and the hydrostatic head from the manufacturer, I could approximate the effect of an axial pump defining this in the section where the pump would be placed. I lowered the momentum control for a while, and once the simulation seemed to be converging, I increased it.

I hope this idea helps.