Abstract
This paper examines the global regularity problem on the two-dimensional incompressible Boussinesq equations with fractional dissipation, given by Λαu in the velocity equation and by Λβθ in the temperature equation, where \(\Lambda - \sqrt { - \Delta } \) denotes the Zygmund operator. We establish the global existence and smoothness of classical solutions when (α, β) is in the critical range: \(\alpha > (\sqrt {1777} - 23)/24 = 0.789103...\), β > 0, and α + β = 1. This result improves previous work which obtained the global regularity for \(\alpha > (23-\sqrt {145})/12 \approx 0.9132,\;\beta>0\), and α + β = 1.
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Partially supported by NSF grant DMS 1313107.
Partially supported by NSF grant DMS 1209153 and the AT&T Foundation at Oklahoma State University.
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Stefanov, A., Wu, J. A global regularity result for the 2D Boussinesq equations with critical dissipation. JAMA 137, 269–290 (2019). https://doi.org/10.1007/s11854-018-0073-4
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DOI: https://doi.org/10.1007/s11854-018-0073-4