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Origins of one dimensional instability in stationary shock and slowly moving shock

Shock instabilities in the numerical sense include the carbuncle phenomenon and the slowly moving shocks. The carbuncle phenomenon is a term referred to the protruding formation at the stagnation region in addition to the continuous bow shock when simulating a high-speed flow over a blunt body. Most...

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Main Authors: Wahi, Nadihah, Ismail, Farzad
Format: Article
Language:English
Published: Academy of Sciences Malaysia 2019
Online Access:http://psasir.upm.edu.my/id/eprint/81591/1/Origins%20of%20one%20dimensional%20instability%20in%20stationary%20shock%20and%20slowly%20moving%20shock.pdf
http://psasir.upm.edu.my/id/eprint/81591/
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spelling my.upm.eprints.815912020-11-03T21:11:46Z http://psasir.upm.edu.my/id/eprint/81591/ Origins of one dimensional instability in stationary shock and slowly moving shock Wahi, Nadihah Ismail, Farzad Shock instabilities in the numerical sense include the carbuncle phenomenon and the slowly moving shocks. The carbuncle phenomenon is a term referred to the protruding formation at the stagnation region in addition to the continuous bow shock when simulating a high-speed flow over a blunt body. Most schemes formulated to cure this problem only focus on the dissipation methods without properly indulged into the real cause, which could also be the root problem for the slowly moving shock. Therefore, this paper attempted to find the source of the problem by firstly analyzing the governing equations starting from 1D case. After using perturbation mechanism on the conservative variables, several factors were found and one of them is caused by perturbation in density. Then, a dissipation was added to the RHS (right-hand side) of the continuity equation to remove the perturbation. This artificial dissipation has shown stable solutions for both stationay and slowly moving shock problems. Academy of Sciences Malaysia 2019 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/81591/1/Origins%20of%20one%20dimensional%20instability%20in%20stationary%20shock%20and%20slowly%20moving%20shock.pdf Wahi, Nadihah and Ismail, Farzad (2019) Origins of one dimensional instability in stationary shock and slowly moving shock. ASM Science Journal, 12 (spec.1). pp. 203-214. ISSN 1823-6782
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Shock instabilities in the numerical sense include the carbuncle phenomenon and the slowly moving shocks. The carbuncle phenomenon is a term referred to the protruding formation at the stagnation region in addition to the continuous bow shock when simulating a high-speed flow over a blunt body. Most schemes formulated to cure this problem only focus on the dissipation methods without properly indulged into the real cause, which could also be the root problem for the slowly moving shock. Therefore, this paper attempted to find the source of the problem by firstly analyzing the governing equations starting from 1D case. After using perturbation mechanism on the conservative variables, several factors were found and one of them is caused by perturbation in density. Then, a dissipation was added to the RHS (right-hand side) of the continuity equation to remove the perturbation. This artificial dissipation has shown stable solutions for both stationay and slowly moving shock problems.
format Article
author Wahi, Nadihah
Ismail, Farzad
spellingShingle Wahi, Nadihah
Ismail, Farzad
Origins of one dimensional instability in stationary shock and slowly moving shock
author_facet Wahi, Nadihah
Ismail, Farzad
author_sort Wahi, Nadihah
title Origins of one dimensional instability in stationary shock and slowly moving shock
title_short Origins of one dimensional instability in stationary shock and slowly moving shock
title_full Origins of one dimensional instability in stationary shock and slowly moving shock
title_fullStr Origins of one dimensional instability in stationary shock and slowly moving shock
title_full_unstemmed Origins of one dimensional instability in stationary shock and slowly moving shock
title_sort origins of one dimensional instability in stationary shock and slowly moving shock
publisher Academy of Sciences Malaysia
publishDate 2019
url http://psasir.upm.edu.my/id/eprint/81591/1/Origins%20of%20one%20dimensional%20instability%20in%20stationary%20shock%20and%20slowly%20moving%20shock.pdf
http://psasir.upm.edu.my/id/eprint/81591/
_version_ 1683232245868920832
score 13.211869

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