Turbulence 3MM

Turbulence 3MM - 1 FACE8 - Turbulence Turbulence Lectures 3...

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Unformatted text preview: 1 FACE8 - Turbulence Turbulence Lectures 3 & 4 Modelling 2 FACE8 - Turbulence Course outline 1 MM Introduction to turbulence Basic concepts of turbulent flow Turbulent flow structures 2 MM Energy cascade Turbulent energy spectrum Turbulent length and time scales 3 MM Grid turbulence Reynolds averaged turbulence models Mixing length models 4 MM 1- and 2- equation models Reynolds stress models 5 MM Large-eddy simulation Direct Numerical Simulation 3 FACE8 - Turbulence Lecture programme 8.15-8.30: Quick group work & discussion 8.30-8.45: Review 8.45-9.30: Grid turbulence 9.30-9.45: Break 9.45-10.45: Turbulence modelling 10.45-11.00: Break 11.00-12.00: Group assignment 4 FACE8 - Turbulence Turbulence modelling 0 and 1-equation models Mixing length model, k-model Require info on scales input a priori by user 2-equation models k- model with variations, RNG Model both energy and dissipation term Reynolds Stress models Solve for 6 individual Reynolds stresses LES Viscous modelling of small scales DNS No modelling required Eddy viscosity RANS Full NS 5 FACE8 - Turbulence Eddy viscosity revisited Concept introduced by Boussinesq Represent the stresses in a turbulent flow as an analogy to those in a laminar flow: Constant of proportionality turbulent / eddy viscosity j i T j i du du i j dx dx + ( 29 j j i i i j T j i j i j i i...
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This note was uploaded on 09/16/2011 for the course ME 563 taught by Professor Staff during the Spring '11 term at Auburn University.

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Turbulence 3MM - 1 FACE8 - Turbulence Turbulence Lectures 3...

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