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Basic question on meshing in 3d and calculations

Posted Jul 15, 2011, 11:02 p.m. EDT Mesh 2 Replies

Supradeep Narayana
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Hi,

when you specify the mesh size, does comsol perform a single calculation in the tetrahedron or does it internally breakdown the tetrahedron in several blocks of smaller sizes and then perform the calculations.

thanks
supra
2 Replies Last Post Jul 18, 2011, 4:37 p.m. EDT
Ruud Borger COMSOL Employee

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Posted: 1 decade ago Jul 16, 2011, 2:54 a.m. EDT
Dear Supradeep,

This depends on the element order - they can be linear, quadratic, tertair, quartic, or higher. Most of the time, quadratic or linear elements are using. In this case, each element has a shape function, where the functions are evaluated on so called Gauss Points. You can view the element order by left-clicking the Physics Interface (for instance "Heat Transfer") and then going to "Discretization". Make sure "Show advanced options" from the Options=>Preferences menu is turned on.

I recommend taking one of our training courses, where this is discussed:
www.comsol.com/events?location=2&type[]=course&sort=start_date

Best regards,

Ruud
Dear Supradeep, This depends on the element order - they can be linear, quadratic, tertair, quartic, or higher. Most of the time, quadratic or linear elements are using. In this case, each element has a shape function, where the functions are evaluated on so called Gauss Points. You can view the element order by left-clicking the Physics Interface (for instance "Heat Transfer") and then going to "Discretization". Make sure "Show advanced options" from the Options=>Preferences menu is turned on. I recommend taking one of our training courses, where this is discussed: http://www.comsol.com/events?location=2&type[]=course&sort=start_date Best regards, Ruud
Supradeep Narayana
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Posted: 1 decade ago Jul 18, 2011, 4:37 p.m. EDT
thanks.. got the idea.. on meshing now..
thanks.. got the idea.. on meshing now..

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