Microscopic modelling of sound waves in granular material: Quarterly progress report, January 1, 1989--March 31, 1989

Technical Report · Wed Mar 01 04:00:00 EST 1989

DOI:https://doi.org/10.2172/6182233· OSTI ID:6182233

Haff, P. K.

Our work over the past several years has been directed toward a detailed examination of the transmission of sound through dry granular materials at the microscopic level. Such a granular system consists of a contact network along which, and only along which, the momentum impulses which comprise the sound wave may travel. In the past several years we have studied two such systems. In one of these grains cascaded down an incline, and the pressure impulses recorded on the bed were studied using computer simulation. We looked at both thin and thick flows. The second type of system studied was a collection of quasi-static grains subjected to compressive loading. 8 refs., 5 figs.

• Research Organization: Duke Univ., Durham, NC (USA). Dept. of Civil and Environmental Engineering
• Sponsoring Organization: USDOE
• DOE Contract Number: FG22-86PC90959
• OSTI ID: 6182233
• Report Number(s): DOE/PC/90959-T9; ON: DE89012399
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
COMPUTERIZED SIMULATION
DOCUMENT TYPES
FLOW RATE
GRANULAR MATERIALS
MATERIALS
MEASURING METHODS
PROGRESS REPORT
SIMULATION
SOUND WAVES
WAVE PROPAGATION