Thanks for those comments as the more I think about it I certainly agree with what you have said.
Every node in the flow domain has a discrete equation associated with it, and will therefore have an associated entry in the global lumped mass matrix. If that node happens to be on a dirichlet...
I am trying to debug a SUPG FEM code for flow problems (based on Brooks Hughes 1982) and have a question about the Lumped Mass Matrix. My understanding of the Lumped Mass Matrix is that for any given element the mass of that element is simply distributed evenly over the number of nodes.
In...