Dear ResearchGate community,
I am currently working on a steady-state thermal analysis of a hollow wall in Ansys Fluent where a low emissivity insulation material is attached to the inside of the wall on one side and is open to a cavity on the other side. While setting up the boundary conditions for the insulation material, I encountered a challenge regarding the specification of the external surface temperature.
Under the radiation tab in Ansys Fluent, I can provide the emissivity value for the insulation material, which I have available. However, the software also requires the input of another parameter, namely the external surface temperature, which is mandatory for the simulation. In my case, the external surface temperature of the insulation layer, which is situated inside the hollow section, is unknown at the start.
As the outside wall temperatures (hot side and cold side) are known, I am seeking guidance on how to address this issue. Specifically, I am interested in understanding the meaning of the external surface temperature in my particular case and exploring possible strategies to overcome this challenge.
Any suggestions or insights from experts in the field would be highly appreciated. Thank you all in advance for your valuable contributions to this discussion.
Hi Dhrutiman Dey;
Can you accurately draw the boundary conditions you want? For example, do you have thermal flux on the inner wall of insulation? Or constant temperature? Draw the solution field and the boundary conditions in a schematic figure.
External surface temperature of an insulation material layer can be determined by running a thermal analysis on the material using Ansys Fluent. If the temperature of the material is not known at the start of the simulation, the temperature can be set as a boundary condition and then gradually increased until the desired temperature is reached.
- Badges
- Science topic