[Getdp] [Gmsh] Formulation GetDP

michael.asam at infineon.com michael.asam at infineon.com
Tue May 10 14:01:56 CEST 2011


Hi Juliana,

sorry for the late reply.
Because your question concerns GetDP it would be better to write to the GetDP mailing-list (getdp at geuz.org).
:-)

The equations in the Formulation-part of the GetDP input file are the partial differential equations in weak
form. They are derived from the PDEs in strong form (the form which more people are familiar with).

Here are some links to interesting pages with this topic:

http://en.wikiversity.org/wiki/Nonlinear_finite_elements/Weak_form_of_Poisson_equation
http://online.redwoods.cc.ca.us/instruct/darnold/staffdev/assignments/calcvarb.pdf
http://en.wikipedia.org/wiki/Calculus_of_variations

And here you'll find a very good video lecture from MIT:
"Mathematical Methods for Engineers II" 
Lecture 23 of 29 - Calculus of Variations / Weak Form
http://academicearth.org/lectures/calculus-variations-weak-form

I hope you find it helpful. 

Kind regards,
Michael Asam




-----Original Message-----
From: gmsh-bounces at ace20.montefiore.ulg.ac.be [mailto:gmsh-bounces at ace20.montefiore.ulg.ac.be] On Behalf Of Juliana
Sent: Monday, May 02, 2011 7:41 PM
To: gmsh at geuz.org
Subject: [Gmsh] Formulation GetDP

Good Afternoon!

In an electrostatic problem in the formulation of the exercise was described in
the following expression:

Equation {
Galerkin {[epsr[] * Dof {d v} {d v}]; In Vol; Jacobian Vol; Integration Int;}
GlobalTerm {[Dof {Q-} / eps0, {V}]; In Grouped;}
}

I began studying the GetDP did not understand how to get this 
[epsr[] * Dof {d v} {d v}] and [-Dof {Q} / eps0, {V}].

How to develop the equations in GetDP?
GetDP solve various kinds of applications such as development.

Thanks,
Juliana.


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