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Title: A Novel Multi-scale Simulation Strategy for Turbulent Reacting Flows

Abstract

In this project, a new methodology was proposed to bridge the gap between Direct Numerical Simulation (DNS) and Large Eddy Simulation (LES). This novel methodology, titled Lattice-Based Multiscale Simulation (LBMS), creates a lattice structure of One-Dimensional Turbulence (ODT) models. This model has been shown to capture turbulent combustion with high fidelity by fully resolving interactions between turbulence and diffusion. By creating a lattice of ODT models, which are then coupled, LBMS overcomes the shortcomings of ODT, which are its inability to capture large scale three dimensional flow structures. However, by spacing these lattices significantly apart, LBMS can avoid the curse of dimensionality that creates untenable computational costs associated with DNS. This project has shown that LBMS is capable of reproducing statistics of isotropic turbulent flows while coarsening the spacing between lines significantly. It also investigates and resolves issues that arise when coupling ODT lines, such as flux reconstruction perpendicular to a given ODT line, preservation of conserved quantities when eddies cross a course cell volume and boundary condition application. Robust parallelization is also investigated.

Authors:
 [1]
  1. Univ. of Utah, Salt Lake City, UT (United States)
Publication Date:
Research Org.:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1432812
Report Number(s):
Final report - Sutherland DE-SC0008998
DOE Contract Number:
SC0008998
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

James, Sutherland C. A Novel Multi-scale Simulation Strategy for Turbulent Reacting Flows. United States: N. p., 2018. Web. doi:10.2172/1432812.
James, Sutherland C. A Novel Multi-scale Simulation Strategy for Turbulent Reacting Flows. United States. doi:10.2172/1432812.
James, Sutherland C. Thu . "A Novel Multi-scale Simulation Strategy for Turbulent Reacting Flows". United States. doi:10.2172/1432812. https://www.osti.gov/servlets/purl/1432812.
@article{osti_1432812,
title = {A Novel Multi-scale Simulation Strategy for Turbulent Reacting Flows},
author = {James, Sutherland C.},
abstractNote = {In this project, a new methodology was proposed to bridge the gap between Direct Numerical Simulation (DNS) and Large Eddy Simulation (LES). This novel methodology, titled Lattice-Based Multiscale Simulation (LBMS), creates a lattice structure of One-Dimensional Turbulence (ODT) models. This model has been shown to capture turbulent combustion with high fidelity by fully resolving interactions between turbulence and diffusion. By creating a lattice of ODT models, which are then coupled, LBMS overcomes the shortcomings of ODT, which are its inability to capture large scale three dimensional flow structures. However, by spacing these lattices significantly apart, LBMS can avoid the curse of dimensionality that creates untenable computational costs associated with DNS. This project has shown that LBMS is capable of reproducing statistics of isotropic turbulent flows while coarsening the spacing between lines significantly. It also investigates and resolves issues that arise when coupling ODT lines, such as flux reconstruction perpendicular to a given ODT line, preservation of conserved quantities when eddies cross a course cell volume and boundary condition application. Robust parallelization is also investigated.},
doi = {10.2172/1432812},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Apr 12 00:00:00 EDT 2018},
month = {Thu Apr 12 00:00:00 EDT 2018}
}

Technical Report:

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