The flow of solid granular material has been proposed as an alternative lubricant to conventional liquid lubricants. Since granular flows are also in numerous industrial and natural processes, they have been the subject of numerous studies. However, it has been a challenge to understand them because of their non-linear and multiphase behavior. There have been several past experiments, which have gained insight into granular flows. For example, previous work by the authors sheared grains in a two-dimensional annular shear cell by varying the velocity and roughness [1]. The present experimental work attempts to further insights from the previous work by specifically studying the interaction between rough surfaces and granular flows when the global solid fraction and grain materials are varied. A two dimensional annular (granular) shear cell, with a stationary outer ring and inner driving wheel, was used for this work. Digital particle tracking velocimetry was used to obtain local granular flow data such as velocity, local solid fraction, and granular temperature. Slip between the driving wall and first layer of granules is also extracted. This slip can be interpreted as momentum transfer or traction performance in granular systems such as wheel-terrain interaction. Parametric studies of global solid fraction and the material of the rough driving surface, attempt to show how these parameters affect the local granular flow properties.
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ASME/STLE 2009 International Joint Tribology Conference
October 19–21, 2009
Memphis, Tennessee, USA
Conference Sponsors:
- Tribology Division
ISBN:
978-0-7918-4895-1
PROCEEDINGS PAPER
An Experimental Study of the Effect of Global Solid Fraction and Surface Material on Couette Granular Flow
Martin C. Marinack, Jr.,
Martin C. Marinack, Jr.
Carnegie Mellon University, Pittsburgh, PA
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Venkata K. Jasti,
Venkata K. Jasti
Carnegie Mellon University, Pittsburgh, PA
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C. Fred Higgs, III
C. Fred Higgs, III
Carnegie Mellon University, Pittsburgh, PA
Search for other works by this author on:
Martin C. Marinack, Jr.
Carnegie Mellon University, Pittsburgh, PA
Venkata K. Jasti
Carnegie Mellon University, Pittsburgh, PA
C. Fred Higgs, III
Carnegie Mellon University, Pittsburgh, PA
Paper No:
IJTC2009-15143, pp. 87-89; 3 pages
Published Online:
February 16, 2010
Citation
Marinack, MC, Jr., Jasti, VK, & Higgs, CF, III. "An Experimental Study of the Effect of Global Solid Fraction and Surface Material on Couette Granular Flow." Proceedings of the ASME/STLE 2009 International Joint Tribology Conference. ASME/STLE 2009 International Joint Tribology Conference. Memphis, Tennessee, USA. October 19–21, 2009. pp. 87-89. ASME. https://doi.org/10.1115/IJTC2009-15143
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