DNS 1-2 Description: Difference between revisions
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= Introduction = | = Introduction = | ||
Turbulent Channel Flow, Re_tau=180 (8x4)Pi | Turbulent Channel Flow, Re_tau=180 (8x4)Pi | ||
DNS were undertaken using PyFR (http://www.pyfr.org/) : | DNS were undertaken using PyFR (http://www.pyfr.org/) version 1.12.0: | ||
<ul> | <ul> | ||
<li> based on the high-order flux reconstruction method of Huynh </li> | <li> based on the high-order flux reconstruction method of Huynh </li> | ||
Revision as of 14:23, 19 September 2021
Introduction
Turbulent Channel Flow, Re_tau=180 (8x4)Pi DNS were undertaken using PyFR (http://www.pyfr.org/) version 1.12.0:
- based on the high-order flux reconstruction method of Huynh
- compressible solver
- a Rusanov Riemann solver was employed to calculate the inter-element fluxes
- an explicit RK45[2R+] scheme was used to advance the solution in time
Review of previous studies
Provide a brief review of related past studies, either experimental or computational. Identify the configuration chosen for the present study and position it with respect to previous studies. If the test case is geared on a certain experiment, explain what simplifications ( e.g. concern- ing geometry, boundary conditions) have been introduced with respect to the experiment in the computational setup to make the computations feasible and avoid uncertainty or ambiguity.
Description of the test case
A detailed self-contained description should be provided. It can be kept fairly short if a link can be made to an external data base where details are given. Then only the differences should be clearly indicated.
Geometry and flow parameters
Describe the general set up of the test case and provide a sketch of the geometry, clearly identifying location and type of boundaries. Specify the non-dimensional flow parameters which define the flow regime (e.g. Reynolds number, Rayleigh number, angle of incidence etc), including the scales on which they are based. Provide a detailed geometrical description, by preference in form of a CAD, or alternatively as lists of points and a description of the interpolation.
Boundary conditions
Specify the prescribed boundary conditions, as well as the means to verify the initial flow development. In particular describe the procedure for determining the in flow conditions comprising the instantaneous (mean and fluctuating) velocity components and other quantities. Provide reference profiles for the mean flow and fluctuations at in flow - these quantities must be supplied separately as part of the statistical data as they are essential as input for turbulence-model calculations. For checking purposes, these profiles should ideally also be given downstream where transients have disappeared; the location and nature of these cuts should be specified, as well as the reference result.
Contributed by: Lionel Agostini — Imperial College London
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