EXP 1-4 Measurement Quantities and Techniques

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

Measurement quantities and techniques

Describe the measurement techniques and indicate which quantities were measured and where. Describe how well conditions at boundaries of the flow such as inflow, outflow, walls, far fields, free surface are given or could be reasonably estimated to provide boundary conditions for CFD calculations.

When carrying out the experiments, a uniform film of 500 μm thickness is prepared utilizing the film thickness sensor. In the next step, the film thickness sensor is moved and a drop is generated. Shadowgraph images are taken during the drop impact onto the liquid film. A synchronized high-performance LED (Constellation 120E) in combination with a diffuser plate provides a uniform background illumination. Images are taken with a high-speed CMOS camera (Photron SA-X2), recording the impact at a frame rate of 20000 fps with a magnification of 31 μm/px.

!!! Show here Fig. 3 from bagheri et al IJHFF (2022) !!!

A suitable setup for CFD calculations including domain size and boundary conditions can be found in the following publication:

M. Bagheri, B. Stumpf, I.V. Roisman, C. Tropea, J. Hussong, M. Wörner, H. Marschall, Interfacial relaxation – Crucial for phase-field methods to capture low to high energy drop-film impacts, Int. J. Heat Fluid Flow, 94 (2022) 108943, https://doi.org/10.1016/j.ijheatfluidflow.2022.108943

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Contributed by: Bastian Stumpf, Milad Bagheri, 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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