DiffusionPhysicsBase

This is a base class for the derived Physics actions setting up objects to solve the diffusion equation with a particular discretization.

The diffusion equation solved is:

var element = document.getElementById("moose-equation-129abf47-b8dd-4597-b505-5ef43a5a375b");katex.render("\\dfrac{\\partial u}{\\partial t} - \\nabla \\cdot D \\nabla u(\\vec{x}) - f(\\vec{x}) = 0", element, {displayMode:true,throwOnError:false});

with Dirichlet boundary conditions:

var element = document.getElementById("moose-equation-1e637c05-ea1e-4096-8695-6a51506cc435");katex.render("u(\\vec{x}) = g", element, {displayMode:true,throwOnError:false});

and / or Neumann boundary conditions:

var element = document.getElementById("moose-equation-636eec1e-ca82-425f-b6df-8a973591ac64");katex.render("D\\dfrac{\\partial u}{\\partial n} = h", element, {displayMode:true,throwOnError:false});

over the boundaries specified by the "dirichlet_boundaries" and "neumann_boundaries" parameters respectively.

The values set at the Dirichlet boundary conditions, $var element = document.getElementById("moose-equation-2f1b4866-290d-4851-a2e6-131e8b17b01c");katex.render("g", element, {displayMode:false,throwOnError:false});$ , and Neumann boundary conditions, $var element = document.getElementById("moose-equation-249c8400-de5b-4fe7-88ca-df4e494b286a");katex.render("h", element, {displayMode:false,throwOnError:false});$ , are set by the "boundary_values" and "boundary_fluxes" respectively.