EXP 1-4 Review of Studies

Axisymmetric drop impact dynamics on a wall film of the same liquid

Front Page

Introduction

Review of experimental studies

Description

Experimental Set Up

Measurement Quantities and Techniques

Data Quality and Accuracy

Measurement Data and Results

Review of Experimental Studies and choice of test case

Provide a brief review of past experimental studies of this test case . Identify your chosen study and state the test case underlying the study, giving reasons for its choice ( e.g. a well-constructed test case, allowing good quality control and accurate measurements, of scientific and/or practical interest and as test case for CFD studies). Indicate whether or not the experiments have been designed for the purpose of CFD validation (desirable but not mandatory).

A review of experimental studies on mass and momentum interactions during drop impact on a liquid film is provided by Liang & Mudawar (2016) while an overview on important experimental studies and findings since then can be found in Stumpf et al. (2023). Experiments on the dynamics of the droplet-wall-film interaction in the event that the entire impact process is rotational symmetrical are lacking so far. Such data are highly relevant for the development of simulation methods, since the numerical effort of axisymmetric computations remains limited compared to 3D calculations and extensive comparative studies can be carried out for validation and methodical developments. The present experiment provides such data and has been especially designed for the validation of CFD methods for numerical simulation of two-phase flows where the gas-liquid interface is well resolved.

G. Liang, I. Mudawar, Review of mass and momentum interactions during drop impact on a liquid film, Int. J. Heat Mass Transf., 101 (2016) 577-599, https://doi.org/10.1016/j.ijheatmasstransfer.2016.05.062

B. Stumpf, I.V. Roisman, A.L. Yarin, C. Tropea, Drop impact onto a substrate wetted by another liquid: corona detachment from the wall film, J. Fluid Mech., 956 (2023) A10, https://doi.org/10.1017/jfm.2022.1060

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Contributed by: Milad Bagheri, Bastian Stumpf, Ilia V. Roisman, Cameron Tropea, Jeanette Hussong, Martin Wörner, Holger Marschall — Technical University of Darmstadt and Karlsruhe Institute of Technology

Front Page

Introduction

Review of experimental studies

Description

Experimental Set Up

Measurement Quantities and Techniques

Data Quality and Accuracy

Measurement Data and Results

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