How to apply boundary condition on nodes using recommended workflow of PDE Toolbox?

Can we use a function handle to applyBoundaryCondition on region type "Nodes"?

If not, is there any other way of apply boundary conditions on edge nodes using recommended workflow of PDE Toolbox?

Answer 1

[Ravi Kumar]

Hi Aditi,

It is currently not possible to apply BC onto Nodes directly. Can you provide a bit more details on your use case, with example code, to see if there is a workaround to achieve the end goal.

Regards, Ravi

[Aditi]

My problem is related to applying boundary condition on nodes, and the boundary condition value is dependent on value of parameter a.My code is :

if a>2
    BC = @(region,state) [(state.u(1,:)-E_0a)+state.u(2,:).*(E_0c-state.u(1,:));...
         -state.u(2,:).*(E_0c-state.u(1,:))];
else
BC = @(region,state) [state.u(2,:).*(E_0c-state.u(1,:));...
        -state.u(2,:).*(E_0c-state.u(1,:))];
end
applyBoundaryCondition(model,'neumann','Edge',5:20,'g',BC,'Vectorized','off');

I need to define value of boundary condition at nodes for which a parameter is known. For example, if for node 2, if a > 2, then apply boundary condition 1 on that node, and boundary condition 2 for rest of the nodes.

Is there any way to do this using recommended workflo of PDE Toolbox?