J.‐M. Buchlin

Von Karman Institute for Fluid Dynamics

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A. K. Stubos

National Centre of Scientific Research "Demokritos"

Patrick Rambaud

Von Karman Institute for Fluid Dynamics

Ph. Planquart

Von Karman Institute for Fluid Dynamics

Miguel Alfonso Mendez

Von Karman Institute for Fluid Dynamics

J. Anthoine

Université de Toulouse

M. L. Riethmuller

Von Karman Institute for Fluid Dynamics

Anne Gosset

Universidade da Coruña

Maria Rosaria Vetrano

KU Leuven

Delphine Laboureur

Von Karman Institute for Fluid Dynamics

Jeroen van Beeck

Von Karman Institute for Fluid Dynamics

Cooperative Institutions

Von Karman Institute for Fluid Dynamics

Centre National de la Recherche Scientifique

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Université Libre de Bruxelles

Delft University of Technology

Universitat Politècnica de Catalunya

Laboratoire Énergies et Mécanique Théorique et Appliquée

Université de Toulouse

Université de Lorraine

CEA Gramat

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On the separated flow upstream of a jet in a cross flow

29th Aerospace Sciences Meeting (1989)

A. Krothapalli L. Lourenço J.‐M. Buchlin

Flow visualization techniques have been used to investigate the complex flow in the recirculation region upstream of a rectangular jet issuing normally into a uniform cross flow. Two different flow regimes are identified. It is shown that the recirculation region upstream of the jet is unsteady and periodic. Two distinct vortical structures are found for the wake behind the jet, one dominated by a symmetric vortex pair and one with vortices shed alternately from each side of the jet.

10.2514/6.1989-571

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Experimental investigation of a 2d impinging jet on a liquid surface

WIT transactions on engineering sciences (2009)

R. Berger S. Depardon Patrick Rambaud J.‐M. Buchlin

An experimental investigation of impinging 2d planar air jet on a water surface is performed by means of Particle Image Velocimetry (PIV).The difficulty encountered to measure the two dimensional velocity and turbulence fields close to the interface requires a special treatment of the PIV data obtained in the air and water sides.The resulting technique enables the localisation of the moving interface, the use of the inter-correlation and the calculation of statistics in both phases.The results show that the proposed PIV interface detection technique is in good agreement with the LeDaR detection technique developed at the von Karman Institute.The analysis of the air and water velocity field close to the interface highlights the topological differences between dimpling and incipient splashing configurations.The results obtained in this study will serve to model later turbulence transfer in impinging jet configuration.

Velocimetry

Interface (matter)

10.2495/mpf090431

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Stratification mitigation in the upper tank of a natural circulation loop simulating passive decay heat removal in a pool type reactor

Chiara Spaccapaniccia Philippe Planquart J.‐M. Buchlin

Natural circulation

Decay heat

Stratification (seeds)

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A prediction method for the air-droplets flow in the inlet section of a natural draft cooling tower

NASA STI/Recon Technical Report N (1986)

C. Benocci J.‐M. Buchlin Paul Weinacht

Cooling tower

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Numerical study of formation of thermal non uniformities in active packed beds. Final report

M.W. Hill J.‐M. Buchlin

The purpose of this work was to mathematically model the heat transfer in an active bed heat exchanger and to develop an appropriate numerical scheme for the solution of the temperature field. As active packed beds are being considered for use in nuclear reactors, concern is generated as to whether regions of relatively high temperatures will develop. Such concern is the impetus behind the application of the program to two applications concerning heat transfer in packed beds assuming variable porosity of the Brosilow type and the existence of blockages. The results show that for the case of a packed bed with the porosity distribution the so-called hot spot occurs near the wall of the bed. Its magnitude and position were seen to be strongly affected by the assumed velocity profile and wall boundary conditions. In addition, as the proposed mathematical equations include axial conduction as opposed to a previously developed program which excluded axial conduction and as the results of the two programs approached one another as the Re increased, it is reasonable that the previous program (as it is based on parabolic, not elliptic equations as in the present case) could be implemented with little error expected due tomore » the lack of axial conduction.« less

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Industrial computational fluid dynamics : May 31-June 4, 1999

von Karman Institute for Fluid Dynamics eBooks (1999)

J.‐M. Buchlin Ph. Planquart

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Modelling and Applications of Transport Phenomena in Porous Media

Theory and applications of transport in porous media (1991)

Jacob Bear J.‐M. Buchlin

10.1007/978-94-011-2632-8

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Citations (225)

Experimental and numerical study of a cryogenic valve using liquid nitrogen and water

Aerospace Science and Technology (2019)

Jorge Pinho Laura Peveroni Maria Rosaria Vetrano J.‐M. Buchlin Johan Steelant

Liquid nitrogen

Flow coefficient

10.1016/j.ast.2019.105331

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Citations (17)

Validation of large eddy simulation of the heat transfer induced by an impinging jet using quantitative infrared thermography

Proceedings of the 2010 International Conference on Quantitative InfraRed Thermography (2004)

Ph. Planquart J.‐M. Buchlin

Impinging fluid jets are widely used in industrial processes where high momentum and/or mass transfer have to be reached. Typical applications are jet wiping, the drying of paper and textile, the cooling of turbine blades, the anti-icing of aircraft, the tempering of glass sheets, the cooling of moving metal strips, the cooling of electronic equipment, ... Numerical simulations of these impinging jets are mainly performed solving the Reynolds Averaged Navier-Stokes equations. However, it has been shown that this approach for the simulation of turbulence overestimates the heat transfer coefficient at the impinging region (overestimates of 100% have been observed). Therefore, the Large Eddy Simulation (LES) approach, which models only the small scales of turbulence and resolves the large scales is used to compute a round impinging jet with a Reynolds number varying from 3.000 to 70.000.

Thermography

Large-Eddy Simulation

10.21611/qirt.2004.085

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MENISCUS CONTROL BY A STRING IN A ROLL COATING EXPERIMENT

J.‐M. Buchlin M. Decré E. Gailly Philippe Planquart

Meniscus

10.1142/9789814503914_0013

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