The field and particle trajectory simulator
Industry standard charged particle optics software
Refine your design: model > simulate > view > analyze > program > optimize it.
SIMION v8.1.3.0-TEST posted.
About | Documentation | Community/Support | Downloads | Ordering

Dirichlet Boundary Conditions

In solving partial differential equations, such as the Laplace Equation or Poisson Equation where we seek to find the value of potential \phi throughout some volume of space (using methods like SIMION Refine), it can be necessary to impose constraints on that variable (\phi) at the boundary surface of that space in order to obtain a unique solution (see First Uniqueness Theorem). The two main types of these boundary conditions are Neumann Boundary Condition and Dirichlet boundary conditions.

A Dirichlet boundary condition in the Laplace equation imposes the restriction that the potential is some value at some location. A common case of Dirichlet boundary conditions are surfaces of perfectly conductive electrodes. Free charges in such a conductor will rearrange themselves over the conductive surfaces so that the potential will be uniform over the entire conductor. Typically, electrodes are held to some known potential by attaching them to a power supply or ground, so the Dirichlet condition is known directly, but conductive surfaces may alternately be floating.

Any comments on this web page? (will be sent to SIS SIMION Support)
[Optional] Your name: email: phone/fax: