Automotive aerodynamics prediction using a fast transient solver for low-Mach number compressible flow

L. Yu; S. Diasinos; B. Thornber

doi:10.14264/f70a023

Automotive aerodynamics prediction using a fast transient solver for low-Mach number compressible flow

L. Yu, S. Diasinos, B. Thornber

School of Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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Abstract

This paper presents a fractional step time stepping scheme for low-Mach number compressible flow. The advantage of the proposed scheme compared to the iterative SIMPLEC is significant saving in computation effort while preserving secondorder accuracy. The proposed scheme and a transient SIMPLEC algorithm are verified and validated using a 2D convective isentropic vortex to qualitatively evaluate their convergence properties. Both schemes are stable at convective Co number equal one, and acoustic CFL greater than one. The L2 error norms of both schemes show second order accuracy, but the proposed scheme uses significantly less computation effort. Next, the aerodynamics of flow past a SAE 20◦ Notchback Model is predicted using the proposed scheme. Results of the SAE Model show good grid convergence, and good agreement in surface pressure coefficients with experimental measurement.

Original language	English
Title of host publication	Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020
Editors	H. Chanson, R. Brown
Place of Publication	Brisbane
Publisher	The University of Queensland
Number of pages	4
ISBN (Electronic)	9781742723419
DOIs	https://doi.org/10.14264/f70a023
Publication status	Published - 2020
Event	Australasian Fluid Mechanics Conference (22nd : 2020) - Brisbane, Australia Duration: 7 Dec 2020 → 10 Dec 2020 Conference number: 22nd

Conference

Conference	Australasian Fluid Mechanics Conference (22nd : 2020)
Abbreviated title	AFMC2020
Country/Territory	Australia
City	Brisbane
Period	7/12/20 → 10/12/20

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

Fractional step method
Automotive aerodynamics
Low-Mach number compressible flow

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10.14264/f70a023Licence: CC BY-NC

Publisher version (open access)Final published version, 466 KBLicence: CC BY-NC

Cite this

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title = "Automotive aerodynamics prediction using a fast transient solver for low-Mach number compressible flow",

abstract = "This paper presents a fractional step time stepping scheme for low-Mach number compressible flow. The advantage of the proposed scheme compared to the iterative SIMPLEC is significant saving in computation effort while preserving secondorder accuracy. The proposed scheme and a transient SIMPLEC algorithm are verified and validated using a 2D convective isentropic vortex to qualitatively evaluate their convergence properties. Both schemes are stable at convective Co number equal one, and acoustic CFL greater than one. The L2 error norms of both schemes show second order accuracy, but the proposed scheme uses significantly less computation effort. Next, the aerodynamics of flow past a SAE 20◦ Notchback Model is predicted using the proposed scheme. Results of the SAE Model show good grid convergence, and good agreement in surface pressure coefficients with experimental measurement.",

keywords = "Fractional step method, Automotive aerodynamics, Low-Mach number compressible flow",

author = "L. Yu and S. Diasinos and B. Thornber",

note = "Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.; Australasian Fluid Mechanics Conference (22nd : 2020), AFMC2020 ; Conference date: 07-12-2020 Through 10-12-2020",

year = "2020",

doi = "10.14264/f70a023",

language = "English",

editor = "H. Chanson and R. Brown",

booktitle = "Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020",

publisher = "The University of Queensland",

}

Yu, L, Diasinos, S & Thornber, B 2020, Automotive aerodynamics prediction using a fast transient solver for low-Mach number compressible flow. in H Chanson & R Brown (eds), Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020., 225, The University of Queensland, Brisbane, Australasian Fluid Mechanics Conference (22nd : 2020), Brisbane, Queensland, Australia, 7/12/20. https://doi.org/10.14264/f70a023

Automotive aerodynamics prediction using a fast transient solver for low-Mach number compressible flow. / Yu, L.; Diasinos, S.; Thornber, B.
Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020. ed. / H. Chanson; R. Brown. Brisbane: The University of Queensland, 2020. 225.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

TY - GEN

T1 - Automotive aerodynamics prediction using a fast transient solver for low-Mach number compressible flow

AU - Yu, L.

AU - Diasinos, S.

AU - Thornber, B.

N1 - Conference code: 22nd

PY - 2020

Y1 - 2020

N2 - This paper presents a fractional step time stepping scheme for low-Mach number compressible flow. The advantage of the proposed scheme compared to the iterative SIMPLEC is significant saving in computation effort while preserving secondorder accuracy. The proposed scheme and a transient SIMPLEC algorithm are verified and validated using a 2D convective isentropic vortex to qualitatively evaluate their convergence properties. Both schemes are stable at convective Co number equal one, and acoustic CFL greater than one. The L2 error norms of both schemes show second order accuracy, but the proposed scheme uses significantly less computation effort. Next, the aerodynamics of flow past a SAE 20◦ Notchback Model is predicted using the proposed scheme. Results of the SAE Model show good grid convergence, and good agreement in surface pressure coefficients with experimental measurement.

AB - This paper presents a fractional step time stepping scheme for low-Mach number compressible flow. The advantage of the proposed scheme compared to the iterative SIMPLEC is significant saving in computation effort while preserving secondorder accuracy. The proposed scheme and a transient SIMPLEC algorithm are verified and validated using a 2D convective isentropic vortex to qualitatively evaluate their convergence properties. Both schemes are stable at convective Co number equal one, and acoustic CFL greater than one. The L2 error norms of both schemes show second order accuracy, but the proposed scheme uses significantly less computation effort. Next, the aerodynamics of flow past a SAE 20◦ Notchback Model is predicted using the proposed scheme. Results of the SAE Model show good grid convergence, and good agreement in surface pressure coefficients with experimental measurement.

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M3 - Conference proceeding contribution

BT - Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020

A2 - Chanson, H.

A2 - Brown, R.

PB - The University of Queensland

CY - Brisbane

T2 - Australasian Fluid Mechanics Conference (22nd : 2020)

Y2 - 7 December 2020 through 10 December 2020

ER -

Automotive aerodynamics prediction using a fast transient solver for low-Mach number compressible flow

Abstract

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Keywords

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