I'm solving a system of non-linear equations using finite element method. while giving the values of boundary condition I'm getting the error. How I'm getting that I don't know.
Thank you for reply.
I would write the region more simply as
\[CapitalOmega] = Rectangle[];
I get the error that op has four equations with only three unknown functions.
op
Sorry, I can't help you with the Neumann condition.
Now, do you get any idea about the Neumann boundary conditions. Till now I'm getting error.
P is a pressure term that is also function of x,y i haven't mention that in explicit form
What is D[P, x]?
D[P, x]
Sorry, I have no expertise on Neumann conditions. In the documentation I only see Neumann conditions for linear PDEs, but yours seems nonlinear.
It will be easier to help you if you include the actual code instead of a screenshot.
how can I give that Neumann condition. I have searched in many things I got this only, kindly let me know how to define for that particular condition.
I have made changes. Even though I'm getting error in the Neumann condition alone. Is it correct according to the diagram what I have given for the Neumann condition.
And I have given the Neumann value as zero for the top wall and y=1
This is the problem I have to include this boundary condition
Thank you for your response Even now also I'm getting the same error
In bcs you have typed u[x,y]=0 instead of ==0.
u[x,y]=0
==0
