A dynamically adaptive lattice Boltzmann method for thermal convection problems

• Autorzy: Feldhusen K. , Deiterding R. , Wagner C.

Identyfikatory

DOI

10.1515/amcs-2016-0051

• Języki publikacji: EN

Abstrakty

EN

Utilizing the Boussinesq approximation, a double-population incompressible thermal lattice Boltzmann method (LBM) for forced and natural convection in two and three space dimensions is developed and validated. A block-structured dynamic adaptive mesh refinement (AMR) procedure tailored for the LBM is applied to enable computationally efficient simulations of moderate to high Rayleigh number flows which are characterized by a large scale disparity in boundary layers and free stream flow. As test cases, the analytically accessible problem of a two-dimensional (2D) forced convection flow through two porous plates and the non-Cartesian configuration of a heated rotating cylinder are considered. The objective of the latter is to advance the boundary conditions for an accurate treatment of curved boundaries and to demonstrate the effect on the solution. The effectiveness of the overall approach is demonstrated for the natural convection benchmark of a 2D cavity with differentially heated walls at Rayleigh numbers from 10³ up to 10⁸. To demonstrate the benefit of the employed AMR procedure for three-dimensional (3D) problems, results from the natural convection in a cubic cavity at Rayleigh numbers from 10³ up to 10⁵ are compared with benchmark results.

Słowa kluczowe

EN

lattice Boltzmann method; adaptive mesh refinement; thermal convection; incompressible

PL

metoda siatkowa Boltzmanna; adaptacyjne zagęszczanie siatki; konwekcja termiczna

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mathematics and Computer Science
• Rocznik: 2016
• Tom: Vol. 26, no. 4
• Strony: 735--747
• Opis fizyczny: Bibliogr. 35 poz., rys., tab., wykr.

Twórcy

autor

Feldhusen K.

• Institute of Aerodynamics and Flow Technology, German Aerospace Center (DLR), Bunsenstrasse 10, 37073 Göttingen, Germany; Institute of Thermodynamics and Fluid Mechanics, University of Technology in Ilmenau, Helmholtzring 1, 98693 Ilmenau, Germany

autor

Deiterding R.

• Aerodynamics and Flight Mechanics Research Group, University of Southampton, Highfield Campus, Southampton SO17 1BJ, UK

autor

Wagner C.

• Institute of Aerodynamics and Flow Technology, German Aerospace Center (DLR), Bunsenstrasse 10, 37073 Göttingen, Germany; Institute of Thermodynamics and Fluid Mechanics, University of Technology in Ilmenau, Helmholtzring 1, 98693 Ilmenau, Germany

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.