Hi Haya,
You need to setup the problem using new workflow:
model = createdpde;
Then assign the geometry to the model using decsg and geometryFromEdges functions, first export the geomery using the option in Draw menu of pdetool and then execute the following commands:
g = decsg(gd,sf,ns)
geometryFromEdge(model,g);
The fillin the rest of the details of the model using specifyCoefficient and applyBoundaryConditions function, check for the documentation on the syntax.
Once you are done defining the model, you can generate the mesh and solve for eigenvalue as:
generateMesh(model)
Reign = solvepdeeig(model,[-100, upperFreqLimit])
Regards,
Ravi
