Approximate deconvolution Leray reduced order model for convection-dominated flows

In this paper, we propose a novel ROM stabilization strategy for under-resolved convectiondominated flows, the approximate deconvolution Leray ROM (ADL-ROM). The new ADL-ROM introduces AD as a new means to increase the accuracy of the classical Leray ROM (L-ROM) without degrading its numerical stability. We also introduce two new AD ROM strategies: the Tikhonov and van Cittert methods. Our numerical investigation for convection-dominated systems shows that, when the filter radius is relatively large, the new ADL-ROM is more accurate than the standard L-ROM. Furthermore, the new ADL-ROM is less sensitive with respect to model parameters than L-ROM.

Automated summary

In this paper, a new ROM stabilization strategy called approximate deconvolution Leray ROM (ADL-ROM) is proposed, which introduces AD to increase the accuracy of the classical Leray ROM (L-ROM) without compromising its numerical stability. Two new AD ROM strategies, namely the Tikhonov and van Cittert methods, are also introduced. Numerical investigations demonstrate that the new ADL-ROM is more accurate than the standard L-ROM when the filter radius is relatively large, and it is less sensitive to model parameters than L-ROM.