Comparison Between Navier-Stokes and DSMC Calculations for Low Reynolds Number Slip Flow Past a Confined Microsphere

Abstract

In the present investigation, slip-continuum and molecular (DSMC) flow models have been used to compare the drag coefficient on a confined microsphere over a range of Knudsen numbers between 0.01 and 0.4. The simulations consider a fixed Reynolds number (Re=0.125) and a range of blockage ratios from 2.0 up to 13.0. Two separate problem formulations have been studied; the first considers flow past a confined sphere moving with a constant velocity along the central axis of the pipe while the second considers Poiseuille flow past a stationary confined sphere. Finally, their combination - the case of a confined sphere moving within the carrier Poiseuille flow is investigated using the DSMC method.

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Document Details

Document Type
Technical Report
Publication Date
Jul 13, 2005
Accession Number
ADA446004

Entities

People

  • D. R. Emerson
  • M. Ota
  • R. W. Barber
  • S. K. Stefanov

Organizations

  • Bulgarian Academy of Sciences

Tags

Communities of Interest

  • Advanced Electronics
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Coordinate Systems
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Gas Flow
  • Knudsen Number
  • Mach Number
  • Mean Free Path
  • Mechanical Properties
  • Mechanics
  • Microspheres
  • Particles
  • Physics Laboratories
  • Poiseuille Flow
  • Reynolds Number
  • Slip Flow
  • Spheres

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Fluid Dynamics (CFD)
  • Plasma Physics.