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Taylor Hood or Crouzeix -Raviart element

Posted May 2, 2013, 5:25 a.m. EDT Mesh Version 4.2 2 Replies

Hadi Rajaei
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Hello all

I am using COMSOL for solving the velocity and concentration field. I am using quadratic elements. But I don't know what kind of quadratic elements COMSOL uses. Is it a Taylor Hood or Crouzeix -Raviart ? Can I choose between these two options? Is there a way to find it out?

I really appreciate your answers
2 Replies Last Post Jun 9, 2013, 3:40 p.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 2, 2013, 4:13 p.m. EDT
Hi

check the doc and the discretization node (you might need to turn on the options preferences show advanced or discretization ... several of the advanced options are "hidden" to make the model tree lighter for beginners

--
Good luck
Ivar
Hi check the doc and the discretization node (you might need to turn on the options preferences show advanced or discretization ... several of the advanced options are "hidden" to make the model tree lighter for beginners -- Good luck Ivar
Hadi Rajaei
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Posted: 1 decade ago Jun 9, 2013, 3:40 p.m. EDT
Hi
I found the answer and I want to share it here for future.

COMSOL uses Lagrangian shape function (by difficult) which is a C0 function. It means that the function is discontinuous for first derivative. So the elements are Taylor-hood because Crouzeix -Raviart elements are continuous for first derivative.
Hi I found the answer and I want to share it here for future. COMSOL uses Lagrangian shape function (by difficult) which is a C0 function. It means that the function is discontinuous for first derivative. So the elements are Taylor-hood because Crouzeix -Raviart elements are continuous for first derivative.

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