Boundary value problem: local stifness matrix

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SUMMARY

The discussion centers on solving a boundary value problem (BVP) defined by the equation Δ(u) + u = 1 within the domain Ω, with Dirichlet boundary conditions u = 0 on ∂Ω. The focus is on calculating the local stiffness matrix using linear piecewise functions on a reference triangle defined by the vertices {(0,0), (1,0), (0,1)}. The user confirmed the use of the finite element method (FEM) to approach the problem and successfully resolved their initial confusion regarding the solution process.

PREREQUISITES
  • Understanding of boundary value problems (BVPs)
  • Familiarity with the finite element method (FEM)
  • Knowledge of linear piecewise functions
  • Basic concepts of stiffness matrices in numerical analysis
NEXT STEPS
  • Study the derivation of local stiffness matrices in finite element analysis
  • Explore the implementation of linear piecewise functions in FEM
  • Learn about numerical methods for solving boundary value problems
  • Investigate software tools for FEM simulations, such as ANSYS or COMSOL Multiphysics
USEFUL FOR

Students and professionals in applied mathematics, engineers working with numerical simulations, and anyone involved in solving boundary value problems using the finite element method.

sara_87
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Homework Statement



Given a BVP:

[tex]\Delta(u)+u=1[/tex] in [tex]\Omega[/tex]
u=0 on [tex]\partial\Omega[/tex]
using linear piecewise functions,
calculate the corresponding local stiffness matrix on the reference triangle :
{(x,y); 0<=x<=1, 0<=y<=1-x}.

The domain is a square with one point in the middle (at (0.5,0.5))

Homework Equations





The Attempt at a Solution



Does anyone know where i can start?
 
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which numerical method are you using?
 
I am using the finite element method.
I forgot to mention, i fixed my problem, i know how to do this question :)
 

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