Difference between revisions of "Synthetic Turbulence Inflow Generator"
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== Overview == | == Overview == | ||
The Synthetic Turbulence Inflow generator is a method to produce an inflow boundary condition that results in turbulent flow in a short downstream distance. This method is desired to be more computationally efficient than resolving a flow through from transition. This page will cover the workflow to produce the necessary auxiliary files for running a simulation with the STG boundary condition. | The Synthetic Turbulence Inflow generator is a method to produce an inflow boundary condition that results in turbulent flow in a short downstream distance. This method is desired to be more computationally efficient than resolving a flow through from transition. This page will cover the workflow to produce the necessary auxiliary files for running a simulation with the STG boundary condition. | ||
| − | + | There are three auxiliary files that are needed for the method in the n-procs_case directory at runtime: | |
| − | * | + | * STGInflow.dat |
| − | * | + | * STGSpectra.dat |
| − | * | + | * STGRand.dat |
| − | + | ||
| − | + | = STGInflow.dat = | |
| − | + | This is a file that will contain the mean velocity profiles, mean cross correlation targets, and any additional turbulence modeled scalars. | |
| − | + | = STGSpectra.dat = | |
| − | + | This file will contain the N spectral modes for each node that has the STG the boundary condition. | |
| + | = STGRand.dat = | ||
| + | This file will contain random numbers for the N spectral modes. This is not a spatially varying set of numbers as the spectra is. | ||
== Preperation of Auxiliary Files == | == Preperation of Auxiliary Files == | ||
Revision as of 15:31, 22 February 2021
Synthetic Turbulence Inflow Generator (STG)
Contents
Overview
The Synthetic Turbulence Inflow generator is a method to produce an inflow boundary condition that results in turbulent flow in a short downstream distance. This method is desired to be more computationally efficient than resolving a flow through from transition. This page will cover the workflow to produce the necessary auxiliary files for running a simulation with the STG boundary condition. There are three auxiliary files that are needed for the method in the n-procs_case directory at runtime:
- STGInflow.dat
- STGSpectra.dat
- STGRand.dat
STGInflow.dat
This is a file that will contain the mean velocity profiles, mean cross correlation targets, and any additional turbulence modeled scalars.
STGSpectra.dat
This file will contain the N spectral modes for each node that has the STG the boundary condition.
STGRand.dat
This file will contain random numbers for the N spectral modes. This is not a spatially varying set of numbers as the spectra is.
