NDLI: Near-wall measurements of the bubble- and Lorentz-force-driven convection at gas-evolving electrodes

Content Provider	Springer Nature Link
Author	Baczyzmalski, Dominik Weier, Tom Kähler, Christian J. Cierpka, Christian
Copyright Year	2015
Abstract	Chemical energy storage systems, e.g., in the form of hydrogen or methanol, have a great potential for the establishment of volatile renewable energy sources due to the large energy density. The efficiency of hydrogen production through water electrolysis is, however, limited by gas bubbles evolving at the electrode’s surface and can be enhanced by an accelerated bubble detachment. In order to characterize the complex multi-phase flow near the electrode, simultaneous measurements of the fluid velocities and the size and trajectories of hydrogen bubbles were performed in a water electrolyzer. The liquid phase velocity was measured by PIV/PTV, while shadowgraphy was used to determine the bubble trajectories. Special measurement and evaluation techniques had to be applied as the measurement uncertainty is strongly affected by the high void fraction close to the wall. In particular, the application of an advanced PTV scheme allowed for more precise fluid velocity measurements closer to electrode. Based on these data, stability characteristics of the near-wall flow were evaluated and compared to that of a wall jet. PTV was used as well to investigate the effect of Lorentz forces on the near-wall fluid velocities. The results show a significantly increased wall parallel liquid phase velocity with increasing Lorentz forces. It is presumed that this enhances the detachment of hydrogen bubbles from the electrode surface and, consequently, decreases the fractional bubble coverage and improves the efficiency. In addition, the effect of large rising bubbles with path oscillations on the near-wall flow was investigated. These bubbles can have a strong impact on the mass transfer near the electrode and thus affect the performance of the process.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	56
Issue Number	8
e-ISSN	14321114
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-08-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Fluid Dynamics Fluid- and Aerodynamics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Spatially resolved measurements in a liquid metal flow with Lorentz force velocimetry

High-speed PIV measurements of the near-wall flow field over hairy surfaces

Bubble reconstruction method for wire-mesh sensors measurements

Experiments on bubble dynamics between a free surface and a rigid wall

Flow around two tandem square cylinders near a plane wall

Experimental study on turbulent natural convection heat transfer in water with sub-millimeter-bubble injection

Density measurements using near-field background-oriented Schlieren

A comparison of wake measurements in motor-driven and flow-driven turbine experiments

Non-intrusive measurements of convective heat transfer in smooth- and rough-wall microchannels: laminar flow

Near-wall measurements of the bubble- and Lorentz-force-driven convection at gas-evolving electrodes

Similar Documents

Spatially resolved measurements in a liquid metal flow with Lorentz force velocimetry

High-speed PIV measurements of the near-wall flow field over hairy surfaces

Bubble reconstruction method for wire-mesh sensors measurements

Experiments on bubble dynamics between a free surface and a rigid wall

Flow around two tandem square cylinders near a plane wall

Experimental study on turbulent natural convection heat transfer in water with sub-millimeter-bubble injection

Density measurements using near-field background-oriented Schlieren

A comparison of wake measurements in motor-driven and flow-driven turbine experiments

Non-intrusive measurements of convective heat transfer in smooth- and rough-wall microchannels: laminar flow

Near-wall measurements of the bubble- and Lorentz-force-driven convection at gas-evolving electrodes