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math.NA2024
Duality based error control for the Signorini problem
Ben S. Ashby, Tristan Pryer
In this paper we study the a posteriori bounds for a conforming piecewise linear finite element approximation of the Signorini problem. We prove new rigorous a posteriori estimates…
math.NA2024
Discretisation of an Oldroyd-B viscoelastic fluid flow using a Lie derivative formulation
Ben S. Ashby, Tristan Pryer
In this article we present a numerical method for the Stokes flow of an Oldroyd-B fluid. The viscoelastic stress evolves according to a constitutive law formulated in terms of the…