Anton Hoyer

I figured that out. By substituting 2.5 into 2.3 and comparing with 2.4 i get an equation to calculate gamma/lambda. Quick question: is there a minus sign missing in 2.6? Because the gamma file in the ImpedSphere_PlaneWave folder declares re_gamma = -1. I attached some screenshots, so maybe you get an idea what went wrong. As a reference the solution from the tutorial (picture 1). Then the rebuild with the same values of gamma and lambda, only with gmsh-geometry and custombc=2 (picture 2) and finally...

I figured that out. By substituting 2.5 into 2.3 and comparing with 2.4 i get an equation to calculate gamma/lambda. Quick question: is there a minus sign missing in 2.6? Because the gamma file in the ImpedSphere_PlaneWave folder declares re_gamma = -1. I attached some Screenshots, so maybe you get an idea what went wrong. As a reference the solution from the tutorial (picture 1). Then the rebuild with the same values of gamma and lambda, only with gmsh-geometry and custombc=2 (picture 2) and finally...

Hello Umberto, thanks for your quick reply! I'm using the approach based on pressure. Anton

Hello, i want to simulate the impact of different objects on wave propagation in the free field. A bit like in the "Impedant Sphere" tutorial, only with more complex geometries and from different angles. I also have alpha values as the absorption coefficient of different materials. I'm working with custom boundary conditions. By studying the PDFs and the forum i got the formula for converting alpha values to Z and from the correlation between gamma and lambda lambda = -gamma(Z/(j rho omega)) i theoretically...

Hello, i want to simulate the impact of different objects on wave propagation in the free field. A bit like in the "Impedant Sphere" tutorial, only with more complex geometries and from different angles. I also have alpha values as the absorption coefficient of different materials. I'm working with custom boundary conditions. By studying the PDFs and the forum i got the formula for converting alpha values to Z and from the correlation between gamma and lambda "lambda = -gamma(Z/(jrho*omega))" i theoretically...

Hello, i want to simulate the impact of different objects on wave propagation in the free field. A bit like in the "Impedant Sphere" tutorial, only with more complex geometries and from different angles. I also have alpha values as the absorption coefficient of different materials. I'm working with custom boundary conditions. By studying the PDFs and the forum i got the formula for converting alpha values to Z and from the correlation between gamma and lambda lambda = -gamma(Z/(jrho*omega)) i theoretically...

Hello, i want to simulate the impact of different objects on wave propagation in the free field. A bit like in the "Impedant Sphere" tutorial, only with more complex geometries and from different angles. I also have alpha values as the absorption coefficient of different materials. I'm working with custom boundary conditions. By studying the PDFs and the forum i got the formula for converting alpha values to Z and from the correlation between gamma and lambda lambda = -gamma(Z/(jrho*omega)) i theoretically...