Thank you so much for the video. I think it could be better to use Surface Normals and then compute (Velocity.Normals) and then integrate with Integrate variables and then calculate flowrate based on this. Using mag(U) to calculate the flow rate is not a general solution and works in specific cases
Dear Ms Hadane. This was a very useful presentation. You have saved me hours. Thanks hugely. (One minor fluids correction: the volume flow would be the integrated normal component velocity through the surface, not the velocity magnitude. This would account for backflow through the surface).
Well ,mag(U) > integrateVariables gives wrong values if flow vector is not perpendicular to the surface. Besides the flow angle, it also neglects the direction of flow and does not calculate the net flux.
how to do it for Cylinder2D? I searched and got a formula to multiply density * velocity_X (if the flow is primarily in the x-direction). But I cannot find the density option in the Calculator in Paraview. Can you please tell me how to do it? Please reply
Hello, I'm trying to calculate the pressure drop between inlet and outlet. For this purpose, i am trying to calculate the mass-weighted pressure which i couldn't yet. Do you have any idea how i can calculate this value and find the total pressure drop? Also i've to mention that the flow is incompressible.
As far as I know flow rate = rho V A , are u assuming that the bubbles density is 1 ? because this is miss leading what you are calculating is a mass flux not flow rate .
Don't think this is entirely correct, in that you are first getting the magnitude of velocity and integrating over a surface, i.e. you're taking the dot product of velocity vector with itself. What you should do is the dot product of the velocity with the normal vector of each patch element to get flux.
![[ Paraview Tutorial 9 ] Selection, plot over time and data extraction](http://i.ytimg.com/vi/U2sKoN9NGc8/mqdefault.jpg)
Thank you so much for the video. I think it could be better to use Surface Normals and then compute (Velocity.Normals) and then integrate with Integrate variables and then calculate flowrate based on this.
Using mag(U) to calculate the flow rate is not a general solution and works in specific cases
Thanks for your contribution, your suggestion could be helpful for other users.
Dear Ms Hadane. This was a very useful presentation. You have saved me hours. Thanks hugely. (One minor fluids correction: the volume flow would be the integrated normal component velocity through the surface, not the velocity magnitude. This would account for backflow through the surface).
This video help me a lot. Thank you very much.
This video helped me a lot. Thank you very much for making it.
Well done video! Very helpful.
you helped me again Asmaa! Thank you!
Thankyou for the video. How can we address the value of alpha when calculating flowrate in interfoam?
Well ,mag(U) > integrateVariables gives wrong values if flow vector is not perpendicular to the surface. Besides the flow angle, it also neglects the direction of flow and does not calculate the net flux.
True ! it is applicable is this case since the flow direction is perpendicular to the surface
You are a life saver!
Thank you so much! Great content
how to do it for Cylinder2D? I searched and got a formula to multiply density * velocity_X (if the flow is primarily in the x-direction). But I cannot find the density option in the Calculator in Paraview. Can you please tell me how to do it? Please reply
Many many thank you.
Welcome!
@@CFDAsmaaHadane
How can you install *AI agents* on the Paraview Python console?
What about *tensorflow* ?
Hi dear Asmaa, thank you for your share. I'm working on my PhD thesis, can I ask my questions about the OpenFOAM if I had please?
Thank you
Hello, I'm trying to calculate the pressure drop between inlet and outlet. For this purpose, i am trying to calculate the mass-weighted pressure which i couldn't yet. Do you have any idea how i can calculate this value and find the total pressure drop? Also i've to mention that the flow is incompressible.
I have a new doubt, in case that i wish to know what is the cumulative volume of the bubbles on the outlet, how could i get it?
you can just rename 0 folder as 0.org and paraview ignores it. Nice, Thanks!
As far as I know flow rate = rho V A , are u assuming that the bubbles density is 1 ? because this is miss leading what you are calculating is a mass flux not flow rate .
rho U A is mass flow rate. only U A is volumetric flow rate.
How can i plot head vs time plot in tank drain
how can ı install on my laptop for win 10, thanks a lot
Jozsef Nagy has videos of install to Win10.
Don't think this is entirely correct, in that you are first getting the magnitude of velocity and integrating over a surface, i.e. you're taking the dot product of velocity vector with itself. What you should do is the dot product of the velocity with the normal vector of each patch element to get flux.