Výsledky vyhledávání - "Welter, Roland"

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Rotating Rayleigh-Benard convection: Attractors, bifurcations and heat transport via a Galerkin hierarchy

Autor: Welter, Roland

Motivated by the need for energetically consistent climate models, the Boussinessq-Coriolis (BC) equations are studied with a focus on the Nusselt number, defined as the averaged vertical heat transport. The Howard-Krishnamurthy-Coriolis (HKC) hierar

Externí odkaz: http://arxiv.org/abs/2402.14724

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Time averages and periodic attractors at high Rayleigh number for Lorenz-like models

Autor: Ovsyannikov, Ivan, Rademacher, Jens D. M., Welter, Roland, Lu, Bingying

Revisiting the Lorenz '63 equations in the regime of large of Rayleigh number, we study the occurrence of periodic solutions and quantify corresponding time averages of selected quantities. Perturbing from the integrable limit of infinite $\rho$, we

Externí odkaz: http://arxiv.org/abs/2302.14525

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Dissertation/ Thesis

Asymptotic approximation of fluid flows from the compressible Navier-Stokes equations

Autor: Welter, Roland Kuha

In this thesis a method for studying the asymptotic behavior of solutions to dissipative partial differential equations is developed, motivated by the study of the compressible Navier-Stokes equations in the past works of Hoff and Zumbrun,1995, Hoff

Externí odkaz: https://hdl.handle.net/2144/42958

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Asymptotic approximation of a modified compressible Navier-Stokes system

Autor: Goh, Ryan, Wayne, C. Eugene, Welter, Roland

We study the long time asymptotics of a modified compressible Navier-Stokes system (mcNS) inspired by the previous work of Hoff and Zumbrun. We introduce a new decomposition of the momentum field into its irrotational and incompressible parts, and a

Externí odkaz: http://arxiv.org/abs/2012.12966

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