The Coefficient Form PDE node is the default equation for 
The Coefficient Form PDE Interfaces, and is available for the other forms from the context menu. Specify the coefficients for a coefficient form PDE (see 
The Coefficient Form PDE and 
Equation 16-2)
 
    Enter a value or expression for the diffusion coefficient c. Select 
Isotropic, 
Diagonal, 
Symmetric, or 
Full and enter a 
c coefficient on various forms in 2D and 3D. If there are multiple dependent variables, there is a matrix of 
c component inputs.
 
    Enter a value or expression for the absorption coefficient a. If there are multiple dependent variables, there is a matrix of 
a component inputs.
 
    Enter a value or expression for the source term f. If there are multiple dependent variables, there is a vector of 
f component inputs.
 
    Enter a value or expression for the mass coefficient ea. If there are multiple dependent variables, there is a matrix of 
ea component inputs.
 
    Enter a value or expression for the damping or mass coefficient da. If there are multiple dependent variables, there is a matrix of 
da component inputs.
 
    Enter values or expressions for the conservative flux convection coefficient α vector’s components. If there are multiple dependent variables, there is a matrix of 
α vector component inputs.
 
    Enter values or expressions for the convection coefficient β vector’s components. If there are multiple dependent variables, there is a matrix of 
β vector component inputs.
 
    Enter values or expressions for the conservative flux source term γ vector’s components. If there are multiple dependent variables, there is a vector of 
γ vector component inputs.