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 The information provided may be out of date.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.

Calculating the volume under an isosurface?

Please login with a confirmed email address before reporting spam

I am using one of the COMSOL tutorial models and I would like to know if there is a way to calculate the volume underneath the isosurface.

I am using the heat transfer radiofrequency ablation model. There is an option to view the isosurface/contours, but I would like to know how to calculate the amount of tissue underneath this isosurface.

Any help at all is much appreciated.

1 Reply Last Post 04.08.2015, 02:11 GMT-4
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: 9 years ago 04.08.2015, 02:11 GMT-4
Hi

I have not fully identified the model you refer to but a volume or a surface is simply the domain/boundary integration of the value "1" over the defined domain/boundary.

If you now have a function f(x,y,z,t) defining an area you use a Bolean expression i.e. f(x,y,z,t)>0.5 instead of the scalar "1" and you get your volume/surface (or length in 1D)

--
Good luck
Ivar
Hi I have not fully identified the model you refer to but a volume or a surface is simply the domain/boundary integration of the value "1" over the defined domain/boundary. If you now have a function f(x,y,z,t) defining an area you use a Bolean expression i.e. f(x,y,z,t)>0.5 instead of the scalar "1" and you get your volume/surface (or length in 1D) -- 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.