July 31, 2023 at 7:54 amAmmar AhmedSubscriber
I am modelling flow through C-D nozzle in 3D. For this I have 2 Fluid Domains and 1 Solid Domain. 1 Fluid domain is used to produce supersonic flow and the other fluid domain has coolant in it which cools down the solid present in between the fluids. I am having confusion with specifying the wall thermal conditions as I want to see how much coolant can cool down the solid walls. For this I am using mass flow rate inlets and pressure outlets. Both flows are counter flow. For now i am giving solid walls, as following. The problem i am facing is that proper heat transfer is observed and proper temperature contours are not developed . Kindly help me out to define the wall thermal conditions properly.
July 31, 2023 at 9:30 amRobAnsys Employee
Depending on how thick the solid is you may find a thin wall & shell conduction will be sufficient. Walls between zones should be "coupled" and have a wall & wall:shadow pair of labels. If you don't have these then Fluent has no way of passing information from one zone to the next.
Read up on "Share Topology" in SpaceClaim.
July 31, 2023 at 10:18 amAmmar AhmedSubscriber
July 31, 2023 at 1:08 pmRobAnsys Employee
The wall & wall:shadow pairs should be left as coupled. Fluent will handle the HTC from the fluid to solid, and all conductivity within the solids. You only need to set the outer wall bounday conditions.
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