Abstract
Inthis paper, we discuss two first-order completely discrete schemes based on Backward Euler and its linearized variant methods for the 2D Sobolev equations with Burgers’ type nonlinearity. First, we derive some a priori estimates for the semi-discrete scheme, then a priori bounds for the fully discrete scheme are obtained for the backward Euler approximation. Use of discrete Gronwall’s Lemma and Stolz-Cesaro’s classical result for sequences show that these estimates for the fully discrete scheme are valid uniformly in time. Moreover, an existence of a global attractor of a discrete dynamical system is derived. Further, optimal a priori error bounds are established, which may depend exponentially on time. It is shown that these error estimates are uniform in time under a uniqueness condition. Moreover, as the coefficient of dispersion μ in − μΔut tends to zero, both the semi-discrete and completely discrete Sobolev equations converge to the corresponding Burgers’ equation linearly with respect to μ. Finally, some numerical examples are established in support of our theoretical analysis.


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Mishra, S., Pany, A.K. Completely discrete schemes for 2D Sobolev equations with Burgers’ type nonlinearity. Numer Algor 90, 963–987 (2022). https://doi.org/10.1007/s11075-021-01218-2
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DOI: https://doi.org/10.1007/s11075-021-01218-2