Accession Number:

ADA445674

Title:

Dynamic Simulation of the Temporal Response of Microstructure Formation in Magnetorheological Fluids

Descriptive Note:

Research paper

Corporate Author:

NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC COMPUTATION

Personal Author(s):

• Ly, H. V.
• Ito, K.
• Banks, H. T.
• Jolly, M. R.
• Reitich, F.

Report Date:

1999-08-23

Pagination or Media Count:

11.0

Abstract:

Efficient numerical simulations of microstructure development in magnetorheological MR fluids are conducted. The simulations, which are based upon a fast multipole algorithm, treat the magnetic inclusions as two-dimensional continuum magnetic entities. The development of microstructure is quantified by computing and recording the time evolution of the effective permeability of composite fluid. Such a principle has been previously exploited for the experimental measurements of microstructure development Jolly, Bender and Mathers, ERMR97, Yonezawa, Japan 1997. As was observed experimentally, numerical simulations reveal the evolution of microstructure to be multimodal in nature. Unlike the experiments, the numerical simulations afford us the ability to observe the physical mechanisms associated with various modes.

Descriptors:

• *ALGORITHMS
• *MICROSTRUCTURE
• MATHEMATICAL MODELS
• SIMULATION
• DYNAMICS
• TWO DIMENSIONAL
• EFFICIENCY
• FLUIDS
• MULTIPOLARITY
• INCLUSIONS
• NUMERICAL ANALYSIS
• PHYSICAL PROPERTIES
• MAGNETIC FIELDS
• PERMEABILITY
• EXPERIMENTAL DATA

Subject Categories:

• Properties of Metals and Alloys
• Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE