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Engineering Mathematics
Review of Viscous Flows
Review of Computational Fluid Mechanics
Review of Turbulence and Turbulence Modeling

Particle Adhesion
Colloids
Simulation Methods
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ME 637 The National Science Foundation
 Aerosols
Introduction to Aerosols | Drag, Lift Forces | Aerosol Kinetics | Virtual Mass, Basset Forces & BBO Equation | Nonspherical Particles | Brownian Motions | Particle Deposition Mechanisms | Electrodynamics | Aerosol Coagulation |

Coagulation of Particles

Effect of Particle Force Field

 The particle force field will modify the collision frequency. It may be shown that the collision distribution function is given as (Friedlander, 2000)

(17)

where

(18)

Here,  is the potential energy of the central force per unit mass with

(19)

Calculation Models

Mono-size Particle

Monosize Particle


Van der Waals

Van der Waals


Van der Waals Force

 The potential energy for the attractive van der Waals force is given by

(20)

where A is the Hamaker constant.

For monosize particles,

(21)

and

(22)

where

(23)

The increase of collision frequency with  is shown in the figure:



Dr. Goodarz Ahmadi | Turbulence & Multiphase Fluid Flow Laboratory | Department of Mechanical & Aeronautical Engineering
Copyright © 2002-2005 Dr. Goodarz Ahmadi. All rights reserved.
Potsdam, New York, 13699
ahmadi@clarkson.edu