Steady three-dimensional patterns in gravity-driven film flow down an inclined sinusoidal bottom contour

Al-Shamaa B, Kahraman T, Wierschem A (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Physics of Fluids American Institute of Physics (AIP)

Book Volume: 35

Article Number: 033307

Journal Issue: 3

DOI: 10.1063/5.0140841

Abstract

We experimentally studied gravity-driven film flow in an inclined corrugated channel. Beyond a critical Reynolds number, three-dimensional patterns appear. We identified two different types of patterns: a synchronous and a checkerboard one. While the synchronous pattern appears at all inclination angles studied, we observed the checkerboard one only at higher inclination angles and Reynolds numbers. The patterns suppress traveling waves and stabilize the steady flow. We characterize the patterns and their generation and provide a flow-regime map.

Authors with CRIS profile

Bashar Al-Shamaa Lehrstuhl für Strömungsmechanik (LSTM) Andreas Wierschem Professur für Hochdruckthermofluiddynamik und Rheologie

How to cite

APA:

Al-Shamaa, B., Kahraman, T., & Wierschem, A. (2023). Steady three-dimensional patterns in gravity-driven film flow down an inclined sinusoidal bottom contour. Physics of Fluids, 35(3). https://doi.org/10.1063/5.0140841

MLA:

Al-Shamaa, Bashar, T. Kahraman, and Andreas Wierschem. "Steady three-dimensional patterns in gravity-driven film flow down an inclined sinusoidal bottom contour." Physics of Fluids 35.3 (2023).

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