Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux

The Roe flux function is one of the most established flux functions for inviscid flow and widely used in many CFD codes. However, the Roe flux suffers from shock instability which is usually observed for very strong shocks as in hypersonic flow. This maybe because the Roe flux does not strictl...

Full description

Saved in:

Bibliographic Details
Main Author:	Roslan, Nur Khairunnisa Hanisah
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TL500-777 Aeronautics Aeronautical engineering
Online Access:	http://eprints.usm.my/45183/1/Nur%20Khairunnisa%20Hanisah%20Binti%20Roslan24.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.45183
record_format	uketd_dc
spelling	my-usm-ep.451832019-08-05T02:46:48Z Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux 2013-07 Roslan, Nur Khairunnisa Hanisah TL500-777 Aeronautics. Aeronautical engineering The Roe flux function is one of the most established flux functions for inviscid flow and widely used in many CFD codes. However, the Roe flux suffers from shock instability which is usually observed for very strong shocks as in hypersonic flow. This maybe because the Roe flux does not strictly adhere to the second law of thermodynamics which is critical to capture shocks. The entropy consistent Euler flux (EC) is a new shock capturing method developed by Ismail & Roe in an attempt to overcome the above mentioned deficiencies of the Roe flux. The EC flux is designed to discretely satisfy the basic conservation laws, besides satisfying the second law of thermodynamics (entropy control). Most of the previous studies on the entropy schemes are based mainly on academic test problems using one-dimension. The main objective of this study is to determine the performance of the EC flux function relative to the Roe flux under subsonic, transonic, supersonic and hypersonic flow. This new flux function is tested for 1D and 2D test problems. The 1D test problem is based on Sod’s shock tube problem, whereas the 2D problems include the Mach 3 flow over a staircase, a steady flow over a cylinder and a steady flow over a NACA 0012 airfoil. In order to solve these 1D and 2D problems, an in-house CFD research code based on inviscid compressible flow was developed for a general 2D curvilinear geometry using structured grids. The grid is generated using GAMBIT software and then fed into a self-written converter software to ensure that the grid configurations are compatible with the newly developed CFD solver. 2013-07 Thesis http://eprints.usm.my/45183/ http://eprints.usm.my/45183/1/Nur%20Khairunnisa%20Hanisah%20Binti%20Roslan24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Aeroangkasa
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TL500-777 Aeronautics Aeronautical engineering
spellingShingle	TL500-777 Aeronautics Aeronautical engineering Roslan, Nur Khairunnisa Hanisah Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux
description	The Roe flux function is one of the most established flux functions for inviscid flow and widely used in many CFD codes. However, the Roe flux suffers from shock instability which is usually observed for very strong shocks as in hypersonic flow. This maybe because the Roe flux does not strictly adhere to the second law of thermodynamics which is critical to capture shocks. The entropy consistent Euler flux (EC) is a new shock capturing method developed by Ismail & Roe in an attempt to overcome the above mentioned deficiencies of the Roe flux. The EC flux is designed to discretely satisfy the basic conservation laws, besides satisfying the second law of thermodynamics (entropy control). Most of the previous studies on the entropy schemes are based mainly on academic test problems using one-dimension. The main objective of this study is to determine the performance of the EC flux function relative to the Roe flux under subsonic, transonic, supersonic and hypersonic flow. This new flux function is tested for 1D and 2D test problems. The 1D test problem is based on Sod’s shock tube problem, whereas the 2D problems include the Mach 3 flow over a staircase, a steady flow over a cylinder and a steady flow over a NACA 0012 airfoil. In order to solve these 1D and 2D problems, an in-house CFD research code based on inviscid compressible flow was developed for a general 2D curvilinear geometry using structured grids. The grid is generated using GAMBIT software and then fed into a self-written converter software to ensure that the grid configurations are compatible with the newly developed CFD solver.
format	Thesis
qualification_level	Master's degree
author	Roslan, Nur Khairunnisa Hanisah
author_facet	Roslan, Nur Khairunnisa Hanisah
author_sort	Roslan, Nur Khairunnisa Hanisah
title	Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux
title_short	Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux
title_full	Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux
title_fullStr	Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux
title_full_unstemmed	Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux
title_sort	computation of 2d inviscid compressible flow using an entropy consistent euler flux
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Aeroangkasa
publishDate	2013
url	http://eprints.usm.my/45183/1/Nur%20Khairunnisa%20Hanisah%20Binti%20Roslan24.pdf
_version_	1747821463944036352

Computation Of 2d Inviscid Compressible Flow Using An Entropy Consistent Euler Flux

Similar Items