https://forums.autodesk.com/t5/cfd-forum/difference-on-surface-and-volume-heat-flux-calculation-by-wall/m-p/7965114#M10467 <P>Can you post two screenshots with the volume part calculation, and the surface part calculation ? I tried on my side and I got the same heat flux results. Maybe you could try to recreate the error with a simpler model, cleaner geometry, simpler shape, 1W heat load and try to debug. Is the mesh okay ? Do you have suppressed part around/touching ?&nbsp;</P> Fri, 27 Apr 2018 13:08:24 GMT Anonymous 2018-04-27T13:08:24Z https://forums.autodesk.com/t5/cfd-forum/difference-on-surface-and-volume-heat-flux-calculation-by-wall/m-p/7963302#M10466 <P>Hello everybody,</P><P>&nbsp;</P><P>I have a simple rectangular wood block.</P><P>I wanna see the total heat flux from that wood block. So, I use wall calculator.</P><P>However, I realized that the results are different when I get the data from volume and surface selection choices for the same part.</P><P>What could be the reason for this difference?</P><P>&nbsp;</P><P>Thanks!</P> Thu, 26 Apr 2018 20:32:43 GMT https://forums.autodesk.com/t5/cfd-forum/difference-on-surface-and-volume-heat-flux-calculation-by-wall/m-p/7963302#M10466 kasruko 2018-04-26T20:32:43Z https://forums.autodesk.com/t5/cfd-forum/difference-on-surface-and-volume-heat-flux-calculation-by-wall/m-p/7965114#M10467 <P>Can you post two screenshots with the volume part calculation, and the surface part calculation ? I tried on my side and I got the same heat flux results. Maybe you could try to recreate the error with a simpler model, cleaner geometry, simpler shape, 1W heat load and try to debug. Is the mesh okay ? Do you have suppressed part around/touching ?&nbsp;</P> Fri, 27 Apr 2018 13:08:24 GMT https://forums.autodesk.com/t5/cfd-forum/difference-on-surface-and-volume-heat-flux-calculation-by-wall/m-p/7965114#M10467 Anonymous 2018-04-27T13:08:24Z