Thank you for the very useful video! But what if we add additional axis in our model? In this case we have orthogonal parallelepiped. Inlet/outlet surfaces YZ. Velocity parabola should be set in z direction: v_x(z). 1) Can we set the same formula in this case: v_x(z) = 6 * u_avg * (z/Lz - z**2/Lz**2)? 2) Should we set walls XZ as periodic boundaries? I tried to do for 10m*1m*1m geometry (100*10*10 cells) with liquid, expressed by water. The u_avg = 1 m/s, XZ walls are set as transient periodic boundaries. Related to the theoretical formula delta p = 12 * mu * Lx * v_avg / (Lz*Lz) = 0.12 Pa, but Fluent predicts 0.098 Pa. May be you know how to fix it and fit the output?
Hello Pr, I watched your video and I have some qestions: 1- How to calclate total pressure drop of all domain? 2- If we using nanofluid, How to calculate Reynolds number (I mean inlet velocity), is it using dynamic viscosity and density of nanofluids or water? 3- what is the type of momentum and energy equations using in Fluent, I mean dimensionnel or adimesionnel? Thank you so much for this video.
Thanks for your interest. 1- To find the total pressure drop take surface integral and calculate area weighted average of the inlet and outlet. 2- Please refer "Corcione M, Cianfrini M, Quintino A. Heat transfer of nanofluids in turbulent pipe flow. Int. J. Therm. Sci. 2012;56:58-69." for detailed explanation. 3- Fluent uses various dimensional forms as per problem definitions. For more detailed explanation refer "www.afs.enea.it/project/neptunius/docs/fluent/html/th/node11.htm".
Thank you for the very useful video! But what if we add additional axis in our model? In this case we have orthogonal parallelepiped. Inlet/outlet surfaces YZ. Velocity parabola should be set in z direction: v_x(z).
1) Can we set the same formula in this case: v_x(z) = 6 * u_avg * (z/Lz - z**2/Lz**2)?
2) Should we set walls XZ as periodic boundaries?
I tried to do for 10m*1m*1m geometry (100*10*10 cells) with liquid, expressed by water. The u_avg = 1 m/s, XZ walls are set as transient periodic boundaries. Related to the theoretical formula delta p = 12 * mu * Lx * v_avg / (Lz*Lz) = 0.12 Pa, but Fluent predicts 0.098 Pa. May be you know how to fix it and fit the output?
Hello Pr, I watched your video and I have some qestions:
1- How to calclate total pressure drop of all domain?
2- If we using nanofluid, How to calculate Reynolds number (I mean inlet velocity), is it using dynamic viscosity and density of nanofluids or water?
3- what is the type of momentum and energy equations using in Fluent, I mean dimensionnel or adimesionnel?
Thank you so much for this video.
Thanks for your interest.
1- To find the total pressure drop take surface integral and calculate area weighted average of the inlet and outlet.
2- Please refer "Corcione M, Cianfrini M, Quintino A. Heat transfer of nanofluids in turbulent
pipe flow. Int. J. Therm. Sci. 2012;56:58-69." for detailed explanation.
3- Fluent uses various dimensional forms as per problem definitions. For more detailed explanation refer "www.afs.enea.it/project/neptunius/docs/fluent/html/th/node11.htm".
Thank you so much Pr for your answers@@Inphitude