Hi everyone,
I am doing a thermal simulation these days, but the result seems abnormal, could anybody help me what's the problem is?
the model is just like a cuboid, it will generae heat, external analysis, steady-state analysis, the initial and ambient condion of temperature is 85℃,then run the program, the result show some area the temperature is lower than 85℃, but i think all the area in the computational domain the temperature should be higher than 85℃.so what's the problem is?
This may be due to temprature losses.
Select the correct material and its properties.
this could be useful i believe.
Hi Avdhesh Chanwaria,
Thanks for your quickly reply, I have choose several material from the database to try, it still not work, the temperature at the edge of the computional domain still blow 85℃.
Other people also told me it maybe due to the wrong boundary condition then caused the temprature losses. because the boundary was not inclosed the model completely. but I think my setting is right, for external analysis, set the temprature 85℃ at initial and ambient condition at wizard is equivalently the temperature boudary condition was add to the outer space of computional domain. and the model is obviously inclosed by the computionnal domain.
How do you think?
Plz check....General Setting<Radiaiton Environment Temperature...
May be radiation environment temperaure is 25℃
Is it right?
i'd suggest posting the model. seems simple enough to take a look at.
otherwise, please describe the full set of boundary conditions
Please check your Initial Conditions: There is a "+" to expand "Solid Parameters, Initial solid temperature", this may be set to the default condition of 25°C. If you use a preview plot while solving, does the solid start at 85°C then cool to 25°C in the corners?
Thanks for all you guys advices, finally, I have found the reason just as Kyu-Hyung Kim's said. My radiation environment temperaure is 25℃, when changed it to 85℃, the results became reasonable.
Hi David Hensel，
I have rsolved this problem by Kyu-Hyung Kim's advice, but I do not know the reason caused this difference? could you explain it by theory?
If you go to Help -> SolidWorks Simulation -> Flow Simulation Technical Reference when Flow Simulation is added-on to SolidWorks, you can view a wealth of information regarding the implemenation and known limitations of many parts of Flow Simulation.
On Page 31: "Environmental and solar radiation can be applied to external and internal problems. In fact, the environment radiation is the non-directional energy flux generated by the walls of an imaginary huge "room" that surrounds the body. This flux has predefined radiation parameters."
If you view page 40 of the PDF, equation 4.11 shows the use of the environmental radiation temperature, this regards heat transfer to ambient, such as the energy dissipation characterized in your model.
Given the scale of your model, you are forcing the edges of the computational domain to hold a high temperature. If this was a known value, it would be appropriate to set the environmental radiation temperature to 85°C.
It might be beneficial if the radiation environment was automatically set to the initial ambient condition, if this is something you'd like to see you can always check for an existing Enhancement Request through the Customer Portal, or submit a new one. If you need further assistance, I suggest you contact your VAR.
Hi David Hensel,
Thanks for your help !
I have another question, as we know, there are three kinds boundary condition. For solidworks flow simulation, How to set these three boundry condition separately? and I heard some simulation software can not set the third kind boundry condition like COMSOL, what about the solidworks flow simulation?
Best regards
You're going to need to elaborate here on what conditions you want to setup.
Plz check....General Setting<Radiaiton Environment Temperature...
May be radiation environment temperaure is 25℃
Is it right?