An Adaptive Cartesian Mesh Based Method to Simulate Turbulent Flows of Multiple Rotating Surfaces

An efficient Cartesian cut-cell/level-set method based on a multiple grid approach to simulate turbulent turbomachinery flows is presented. The finite-volume approach in an unstructured hierarchical Cartesian setup with a sharp representation of the complex moving boundaries embedded into the comput...

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Bibliographic Details
Published in:Flow, turbulence and combustion turbulence and combustion, 2018, Vol.100 (1), p.19-38
Main Authors: Pogorelov, Alexej, Schneiders, Lennart, Meinke, Matthias, Schröder, Wolfgang
Format: Article
Language:English
Subjects:
Automotive Engineering
Boundaries
Cartesian coordinates
Computational fluid dynamics
Computer simulation
Energy conservation
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Finite element method
Fluid- and Aerodynamics
Heat and Mass Transfer
Inflow
Kinematics
Numerical analysis
Processors
Rotating cylinders
Simulation
Turbomachinery
Turbulence
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Summary:An efficient Cartesian cut-cell/level-set method based on a multiple grid approach to simulate turbulent turbomachinery flows is presented. The finite-volume approach in an unstructured hierarchical Cartesian setup with a sharp representation of the complex moving boundaries embedded into the computational domain, which are described by multiple level-sets, ensures a strict conservation of mass, momentum, and energy. Furthermore, an efficient kinematic motion level-set interface method for the rotation of embedded boundaries described by multiple level-set fields on a computational domain distributed over several processors is introduced. This method allows the simulation of multiple boundaries rotating relatively to each other in a fixed frame of reference. To demonstrate the efficiency of the numerical method and the quality of the computed findings the generic test problem of a rotating cylinder surrounded by a stationary hull and the flow over a ducted rotating axial fan with a stationary turbulence generating grid at the inflow are simulated. The computational results of the axial fan show a good agreement with the experimental data.
ISSN:1386-6184
1573-1987
DOI:10.1007/s10494-017-9827-9