Crouzeix-Raviart finite element method for non-autonomous variational problems with Lavrentiev gap

06/12/2021

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by   Anna Kh. Balci, et al.

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We investigate the convergence of the Crouzeix-Raviart finite element method for variational problems with non-autonomous integrands that exhibit non-standard growth conditions. While conforming schemes fail due to the Lavrentiev gap phenomenon, we prove that the solution of the Crouzeix-Raviart scheme converges to a global minimiser. Numerical experiments illustrate the performance of the scheme and give additional analytical insights.