Laminar flow past colinear spheres with fluid injection

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Journal of Fluids Engineering; (United States)

DOI:https://doi.org/10.1115/1.2909477· OSTI ID:7237377

Chiang, H; Kleinstreuer, C ^[1]

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1. Dept. of Mechanical and Aerospace Engineering, North Carolina State Univ., Raleigh, NC (US)

This paper discusses a validated computer simulation model, developed for the analysis and design of colinear porous sphere systems in a convective stream. Using a modified and extended finite element software package, the steady-state Navier-Stokes equations have been solved describing laminar axisymmetric flow past closely spaced monodisperse spheres with fluid injection. Of interest are the coupled nonlinear interaction effects on the fluid flow patterns and ultimately on the drag coefficient of each sphere for different free stream Reynolds numbers (20 {le} Re {le} 200) and intersphere spacings (1.5 {le} d{sub ij} {le} 6.0) in the presence of fluid injection (0 {le} {upsilon}{sub b} {le} 0.1). At small spacings and low Reynolds numbers, fluid injection causes earlier flow separation while for Re {ge} 100 surface blowing is more influential in altering the recirculation zones between spheres and thickening the boundary layers. As a result, the total drag of each sphere decreases with increasing blowing intensity although the pressure or form drag of the first sphere may increase at small spacings.

• OSTI ID: 7237377
• Journal Information: Journal of Fluids Engineering; (United States), Journal Name: Journal of Fluids Engineering; (United States) Vol. 113:2; ISSN JFEGA; ISSN 0098-2202
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
BOUNDARY LAYERS
CHAINS
COMPUTER CODES
COMPUTERIZED SIMULATION
CONVECTION
COUPLING
DIFFERENTIAL EQUATIONS
DISPERSIONS
DRAG
ENERGY TRANSFER
EQUATIONS
FINITE ELEMENT METHOD
FLUID FLOW
FLUID INJECTION
GAS FLOW
HEAT TRANSFER
LAMINAR FLOW
LAYERS
MASS TRANSFER
MATHEMATICAL MODELS
MODIFICATIONS
NAVIER-STOKES EQUATIONS
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PATTERN RECOGNITION
REYNOLDS NUMBER
SIMULATION
SLIP FLOW
SPHERES
STEADY-STATE CONDITIONS