Development of a Multidimensional Residual Distribution Solver for Large Eddy Simulation of Industrial Turbulent Flows.
(2000) In Division of Fluid Mechanics, Department of Heat and Power Engineering, Lund Institute of Technology 1019. Abstract (Swedish)
 Popular Abstract in Swedish
Utveckling av en flerdimensionell residualdistributions lösare för Large Eddy Simulation av industriell turbulenta strömningar.  Abstract
 This thesis presents the results of the author's research activity to develop a timespace accurate flowsolver for Large Eddy Simulations (LES), based on the Multidimensional Residual Distribution approach. The aim of this work is the attempt to develop a compact highorder algorithm which includes multidimensional flow physics, in hope of creating a better algorithm for LES of turbulent compressible flows. The author proposes a natural extension of the multidimensional residual distribution (RD) schemes from steadystate computations, where these schemes have shown increased accuracy with reduced stencil and ease of parallelization, to unsteady computations by using Jameson's dual time steps approach. Thus the unstationary problem is... (More)
 This thesis presents the results of the author's research activity to develop a timespace accurate flowsolver for Large Eddy Simulations (LES), based on the Multidimensional Residual Distribution approach. The aim of this work is the attempt to develop a compact highorder algorithm which includes multidimensional flow physics, in hope of creating a better algorithm for LES of turbulent compressible flows. The author proposes a natural extension of the multidimensional residual distribution (RD) schemes from steadystate computations, where these schemes have shown increased accuracy with reduced stencil and ease of parallelization, to unsteady computations by using Jameson's dual time steps approach. Thus the unstationary problem is reduced to the problem of finding a pseudo steadystate solution at each realtime step by using an efficient marching algorithm in pseudotime. Second order accuracy both in space and in time can be obtained by using this approach. Firstly, we study the unsteady one dimensional Burgers equation, the two dimensional linear wave equation and the circular advection of the cone. Secondly, the multidimensional residual distribution discretization of the different terms of the NavierStokes equations is described. Proper boundary conditions are discussed. A series of testcases are presented to assess the accuracy of the algorithm, as it has been implemented in our NavierStokes solver, called NAS3D. A new compact highorder discretization for the convective part of the NavierStokes equations is proposed. This scheme is proved to be of third order accuracy while having the same compact stencil as the secondorder multidimensional residual distribution schemes. Details of three Subgrid Scale (SGS) models for LES which have been implemented in our code are given. The parallelized code, which uses either MPI or PVM for message passing, proves to scale extremely well with the number of processors. Finally, some results from our LES simulations, both for a simple testcase, e.g. the LES of turbulent channel flow, and for some industrial applications are presented. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/19589
 author
 Caraeni, Doru ^{LU}
 supervisor
 opponent

 Lindblad, Ingemar, FFA Stockholm
 organization
 publishing date
 2000
 type
 Thesis
 publication status
 published
 subject
 keywords
 Thermal engineering, HighOrder Compact Schemes., Compressible Flows, Parallel Computations, Multidimensional Residual Distribution Schemes, Large Eddy Simulation, applied thermodynamics, Termisk teknik, termodynamik
 in
 Division of Fluid Mechanics, Department of Heat and Power Engineering, Lund Institute of Technology
 volume
 1019
 pages
 243 pages
 publisher
 Ole Romers Vag 1, Box 118, SE 22100, Lund Sweden.,
 defense location
 Room M:B, Mbuilding, Lunds Tekniska Högskola
 defense date
 20000929 13:15
 external identifiers

 other:ISRN: LUTMDN/TMVK1019SE
 ISSN
 02821990
 ISBN
 9162842803
 language
 English
 LU publication?
 yes
 id
 2364c45bbebe43aa8d68ea542022d36c (old id 19589)
 date added to LUP
 20070524 14:44:17
 date last changed
 20181121 20:35:04
@phdthesis{2364c45bbebe43aa8d68ea542022d36c, abstract = {This thesis presents the results of the author's research activity to develop a timespace accurate flowsolver for Large Eddy Simulations (LES), based on the Multidimensional Residual Distribution approach. The aim of this work is the attempt to develop a compact highorder algorithm which includes multidimensional flow physics, in hope of creating a better algorithm for LES of turbulent compressible flows. The author proposes a natural extension of the multidimensional residual distribution (RD) schemes from steadystate computations, where these schemes have shown increased accuracy with reduced stencil and ease of parallelization, to unsteady computations by using Jameson's dual time steps approach. Thus the unstationary problem is reduced to the problem of finding a pseudo steadystate solution at each realtime step by using an efficient marching algorithm in pseudotime. Second order accuracy both in space and in time can be obtained by using this approach. Firstly, we study the unsteady one dimensional Burgers equation, the two dimensional linear wave equation and the circular advection of the cone. Secondly, the multidimensional residual distribution discretization of the different terms of the NavierStokes equations is described. Proper boundary conditions are discussed. A series of testcases are presented to assess the accuracy of the algorithm, as it has been implemented in our NavierStokes solver, called NAS3D. A new compact highorder discretization for the convective part of the NavierStokes equations is proposed. This scheme is proved to be of third order accuracy while having the same compact stencil as the secondorder multidimensional residual distribution schemes. Details of three Subgrid Scale (SGS) models for LES which have been implemented in our code are given. The parallelized code, which uses either MPI or PVM for message passing, proves to scale extremely well with the number of processors. Finally, some results from our LES simulations, both for a simple testcase, e.g. the LES of turbulent channel flow, and for some industrial applications are presented.}, author = {Caraeni, Doru}, isbn = {9162842803}, issn = {02821990}, keyword = {Thermal engineering,HighOrder Compact Schemes.,Compressible Flows,Parallel Computations,Multidimensional Residual Distribution Schemes,Large Eddy Simulation,applied thermodynamics,Termisk teknik,termodynamik}, language = {eng}, pages = {243}, publisher = {Ole Romers Vag 1, Box 118, SE 22100, Lund Sweden.,}, school = {Lund University}, series = {Division of Fluid Mechanics, Department of Heat and Power Engineering, Lund Institute of Technology}, title = {Development of a Multidimensional Residual Distribution Solver for Large Eddy Simulation of Industrial Turbulent Flows.}, volume = {1019}, year = {2000}, }