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Re: [SCIRUN-USERS] Apply Fem Voltage Source Module

Chronological Thread 
  • From: David Weinstein <>
  • To: "ashok kumar" <>
  • Cc:
  • Subject: Re: [SCIRUN-USERS] Apply Fem Voltage Source Module
  • Date: Fri, 20 Feb 2004 10:49:39 -0700

Hi Ashok,

The InsertVoltageSource module creates a "Dirichlet" Property that gets stored with the Field -- in that Property, we store a list of nodes and values (potentials) that will be used as boundary conditions.

The ApplyFEMVoltageSource module then traverses that Dirichlet Property list -- for each node (i) that has been flagged as having a specified Dirichlet condition (u_i), we modify the stiffness matrix (a) and the right-hand side vector (f). The algorithm we have implemented for these modifications is described here:


On Feb 19, 2004, at 7:00 AM, ashok kumar wrote:


I am interested in knowing what mathematical operations are going inside the applyfemvoltagesource module.

in my net the input to the applyfemvoltagesource module was the field from insertvoltagesource and the stiffness matrix .

how does the applyfemvoltagesource module produce the two output matrices Forward and Rhs matrix from the inputs above ,

please explain the technique which the module uses.

thanking you
yours sincerely


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