A Tracer Particle’s Path through the Turbulent Energy Spectrum

Mommert, Michael and Käufer, Theo and Cierpka, Christian and Wagner, Claus (2026) A Tracer Particle’s Path through the Turbulent Energy Spectrum. In: 24th STAB/DGLR Symposiumon New Results in Numerical and Experimental Fluid Mechanics XV, 156 (1), pp. 727-736. Springer Nature. 24. STAB-DGLR-Symposium 2024, 2024-11-13 - 2024-11-14, Regensburg, Deutschland. doi: 10.1007/978-3-032-11115-9_67. ISBN 978-3-032-11114-2. ISSN 1612-2909.

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Official URL: https://link.springer.com/chapter/10.1007/978-3-032-11115-9_67

Abstract

We present a tool chain to analyze the internal processes of turbulent flows, measured by Lagrangian Particle Tracking (LPT) and Particle Image Thermometry (PIT). It is based on data assimilation by means of Physics-Informed Neural Networks and a subsequent construction of joint distributions of the kinetic energy, velocity vector field curvature and temperature variance as well as the evaluation of their time derivatives. We apply this tool chain to a measured data set of Rayleigh-Bénard convection (RBC) at a Rayleigh number and a Prandtl number resulting in a curvature-based energy-spectrum and an investigation of the links between the physical and phase space.

Item URL in elib:

https://elib.dlr.de/206594/

Document Type:

Conference or Workshop Item (Speech)

Additional Information:

Hardcover ISBN978-3-032-11114-2, Softcover ISBN978-3-032-11117-3, eBook ISBN978-3-032-11115-9, Series ISSN 1612-2909, Series E-ISSN 1860-0824

Title:

A Tracer Particle’s Path through the Turbulent Energy Spectrum

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Mommert, Michael	Michael.Mommert (at) dlr.de	https://orcid.org/0000-0002-7817-3388	174100591
Käufer, Theo	Institut für Thermodynamik und Fluidmechanik, Technische Universität Ilmenau	UNSPECIFIED	UNSPECIFIED
Cierpka, Christian	Institut für Thermodynamik und Fluidmechanik, Technische Universität Ilmenau	UNSPECIFIED	UNSPECIFIED
Wagner, Claus	Claus.Wagner (at) dlr.de	https://orcid.org/0000-0003-2273-0568	UNSPECIFIED

Date:

24 February 2026

Journal or Publication Title:

24th STAB/DGLR Symposiumon New Results in Numerical and Experimental Fluid Mechanics XV

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Volume:

156

DOI:

10.1007/978-3-032-11115-9_67

Page Range:

pp. 727-736

Editors:

Editors	Email	Editor's ORCID iD	ORCID Put Code
Dillmann, Andreas	Andreas.Dillmann (at) dlr.de	UNSPECIFIED	UNSPECIFIED
Heller, Gerd	Airbus Bremen	UNSPECIFIED	UNSPECIFIED
Krämer, Ewald	Institut für Aerodynamik und Gasdynamik Universität Stuttgart	UNSPECIFIED	UNSPECIFIED
Breitsamer, Christian	TU München	UNSPECIFIED	UNSPECIFIED
Wagner, Claus	Claus.Wagner (at) dlr.de	https://orcid.org/0000-0003-2273-0568	UNSPECIFIED
Krenkel, Lars	OTH Regensburg	UNSPECIFIED	UNSPECIFIED

Publisher:

Springer Nature

Series Name:

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

ISSN:

1612-2909

ISBN:

978-3-032-11114-2

Status:

Published

Keywords:

thermal convection, energy spectrum, PINN, PTV

Event Title:

24. STAB-DGLR-Symposium 2024

Event Location:

Regensburg, Deutschland

Event Type:

international Conference

Event Start Date:

13 November 2024

Event End Date:

14 November 2024

Organizer:

STAB/DGLR

HGF - Research field:

Aeronautics, Space and Transport

HGF - Program:

Transport

HGF - Program Themes:

Rail Transport

DLR - Research area:

Transport

DLR - Program:

V SC Schienenverkehr

DLR - Research theme (Project):

V - RoSto - Rolling Stock

Location:

Göttingen

Institutes and Institutions:

Institute for Aerodynamics and Flow Technology > Ground Vehicles

Deposited By:

Mommert, Michael

Deposited On:

19 Dec 2024 11:01

Last Modified:

05 May 2026 20:18

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