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Pressure reconstruction from Lagrangian particle tracking with FFT integration

Huhn, Florian and Schanz, Daniel and Gesemann, Sebastian and Manovski, Peter and Schröder, Andreas (2016) Pressure reconstruction from Lagrangian particle tracking with FFT integration. 18th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 04. - 07. July 2016, Lisbon, Portugal.

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Official URL: http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2016/finalworks2016/papers/02.8_3_59paper.pdf

Abstract

Volumetric time-resolved pressure gradient fields in unsteady flows can be estimated through flow measurements of the material acceleration in the fluid and the assumption of the governing momentum equation. In order to derive pressure, almost exclusively two numerical methods have been used to spatially integrate the pressure gradient until now: first, direct path integration in the spatial domain, and second, the solution of the Poisson equation with numerical methods. We propose an alternative method by integrating the pressure gradient field directly in Fourier space with a standard FFT function. The method is fast and easy to implement. We demonstrate the accuracy of the integration scheme on a synthetic pressure field and apply it to an experimental example based on acceleration data from Lagrangian particle tracking with high seeding density (Shake-The-Box method).

Item URL in elib:https://elib.dlr.de/101423/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper 02.8_3_59
Title:Pressure reconstruction from Lagrangian particle tracking with FFT integration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Huhn, Florianflorian.huhn (at) dlr.deUNSPECIFIED
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Gesemann, Sebastiansebastian.gesemann (at) dlr.deUNSPECIFIED
Manovski, PeterDSTG, AustraliaUNSPECIFIED
Schröder, Andreasandreas.schroeder (at) dlr.deUNSPECIFIED
Date:2016
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-15
Series Name:Conference Proceedings online, Book of Abstracts
Status:Published
Keywords:Lagrangian particle tracking, volumetric pressure reconstruction, helium-filled soap bubbles, LED illumination
Event Title:18th International Symposium on Applications of Laser Techniques to Fluid Mechanics
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:04. - 07. July 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:21 Jul 2016 16:38
Last Modified:31 Jul 2019 19:58

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