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September 17, 2023 at 5:29 pm
Shuvam Paul
SubscriberI have simulated a hydraulic jump. There is a difference in water and ambient(air)temperature and as such there is heat transfer across the water-air interface. I have used VOF model and Standard K-epsilon model for the simulation. Energy Model is activated. Radiation is not considered.Â
Is there any way to determine the total heat transfer rate across the water-air interface bounded between the two sections(vertical lines) as shown in figure below? Also, is there a way to determine heat flux across the same interface or average equivalent thermal conductivity or average heat transfer co-efficient at the interface.?
Also I tried to determine heat flux across a point at the interface in CFD post. But it was shown as "Undefined". While the heat flux at any point at solid boundary could be easily determined. Why?
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September 18, 2023 at 3:42 pm
Rob
Forum ModeratorIn Fluent the Heat Flux report is only available for meshed surfaces, ie not iso-surfaces etc. That's in part due to nonmeshed surfaces not having facet normals. You may be able to do something with a combination of a isosurfaces, surface transform and temperature data in Excel but it's going to be a little messy.Â
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September 19, 2023 at 6:53 am
Shuvam Paul
SubscriberThanks for your Reply ROB.Â
I wanted to know if I can create an iso-surface with constant water colume fraction of say 0.7 , bounded by section1 and section 2 as shown in the above figure ? It would be of great help if I could do so.
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September 20, 2023 at 2:12 pm
Rob
Forum ModeratorYou can. Create the isosurface of volume fraction and then have a look at isoclip.Â
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