Институт вычислительной математики
и математической геофизики

The International Conference on Computational Mathematics


Numerical solution of differential and integral equations

Finite superelement method for velosity skin-layer problem

Galanin M.P., Savenkov E.B.

Keldysh Institute of Applied Mathematics RAS (Moscow)

In this work we consider finite superelement method for the velocity skin-layer problem, which arises from mathematical modelling of processes in electro-magnetic launchers. We consider this problem in two spatial dimensions. In this case, from the mathematical point of view, it leads to the nonstationary convection-diffusion problem in the domain with complex geometry.

We introduce the variational equation which natural Petrov-Galerkin approximation leads to Fedorenko Finite Superelemet Method (FSEM). FSEM is considered as Petrov-Galerkin approximation of the certain problem for traces of boundary-value problem solution at the boundaries of superelements. To constract variational equation mentioned above Poincare-Steklov operators were used.

We also consider regularized FSEM scheme. To construct it we use nonlinear artificial diffusion.

Some results on combined finite superelements/finite elements approximations are presented. Some numerical results are presented.

Note. Abstracts are published in author's edition

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