Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Create Probing Surface then Surface Integrate over it

Please login with a confirmed email address before reporting spam

Good evening Ladies and Gentlemen!

I'm working with a 3D fluid flow model, and I want to find the mass flow rate through an arbitrary cross section of the flow. How can I create a surface that can then be integrated across to get mdot = rho*velocity*area? I am easily able to integrate with the "Derived Values" --> "Integration" --> "Surface Integration" command, but I do not know how to create a selectable surface at any arbitrary cross section!

Thanks,

TEB

1 Reply Last Post Dec 20, 2012, 3:32 p.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Dec 20, 2012, 3:32 p.m. EST
Hi

easiest, I would say is to define the surface via a Boolean function on a Data Set "cut plane", if you cannot define it front up via a boundary

--
Good luck
Ivar
Hi easiest, I would say is to define the surface via a Boolean function on a Data Set "cut plane", if you cannot define it front up via a boundary -- Good luck Ivar

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.