Numerical investigation of the flow around a generic car using dynamic mode decomposition

Martin Peichl; Steffen Mack; Thomas Indinger; Friedhelm Decker

doi:10.1115/FEDSM2014-21255

Numerical investigation of the flow around a generic car using dynamic mode decomposition

Martin Peichl, Steffen Mack, Thomas Indinger, Friedhelm Decker

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

16 Scopus citations

Abstract

The drag of a car is highly dependent on the topology of its complex wake system. Small changes in the shape of the car, that do not have a big effect when considered separately, can lead to significant changes in the total drag when the vortex systems of the changed part of the car body interact with the wake vortices. To understand these interferences, a method is necessary that decomposes the flow based on dynamic information. In this paper, the feasibility of using the Dynamic Mode Decomposition (DMD) to analyze the dynamic behavior of the wake flow of a car is investigated. The DMD is found to extract useful information from the flow when applied to three dimensional velocity vector fields. The CFD simulations are validated by yet unpublished experimental results from experiments in two different wind tunnels.

Original language	English
Title of host publication	Symposia
Subtitle of host publication	Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791846230
DOIs	https://doi.org/10.1115/FEDSM2014-21255
State	Published - 2014
Event	ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels - Chicago, United States Duration: 3 Aug 2014 → 7 Aug 2014

Publication series

Name	American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
Volume	1C
ISSN (Print)	0888-8116

Conference

Conference	ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels
Country/Territory	United States
City	Chicago
Period	3/08/14 → 7/08/14

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10.1115/FEDSM2014-21255

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Peichl, M., Mack, S., Indinger, T., & Decker, F. (2014). Numerical investigation of the flow around a generic car using dynamic mode decomposition. In Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM; Vol. 1C). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/FEDSM2014-21255

Peichl, Martin ; Mack, Steffen ; Indinger, Thomas et al. / Numerical investigation of the flow around a generic car using dynamic mode decomposition. Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes. American Society of Mechanical Engineers (ASME), 2014. (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM).

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title = "Numerical investigation of the flow around a generic car using dynamic mode decomposition",

abstract = "The drag of a car is highly dependent on the topology of its complex wake system. Small changes in the shape of the car, that do not have a big effect when considered separately, can lead to significant changes in the total drag when the vortex systems of the changed part of the car body interact with the wake vortices. To understand these interferences, a method is necessary that decomposes the flow based on dynamic information. In this paper, the feasibility of using the Dynamic Mode Decomposition (DMD) to analyze the dynamic behavior of the wake flow of a car is investigated. The DMD is found to extract useful information from the flow when applied to three dimensional velocity vector fields. The CFD simulations are validated by yet unpublished experimental results from experiments in two different wind tunnels.",

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Peichl, M, Mack, S, Indinger, T & Decker, F 2014, Numerical investigation of the flow around a generic car using dynamic mode decomposition. in Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, vol. 1C, American Society of Mechanical Engineers (ASME), ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, Chicago, United States, 3/08/14. https://doi.org/10.1115/FEDSM2014-21255

Numerical investigation of the flow around a generic car using dynamic mode decomposition. / Peichl, Martin; Mack, Steffen; Indinger, Thomas et al.
Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes. American Society of Mechanical Engineers (ASME), 2014. (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM; Vol. 1C).

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

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Peichl M, Mack S, Indinger T, Decker F. Numerical investigation of the flow around a generic car using dynamic mode decomposition. In Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes. American Society of Mechanical Engineers (ASME). 2014. (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM). doi: 10.1115/FEDSM2014-21255

Numerical investigation of the flow around a generic car using dynamic mode decomposition

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