# Peer-reviewed Articles

#####
**Effective Permittivity of Dense Random Particulate Plasmonic Composites** (with Satvik N. Wani and Radhakrishna Sureshkumar), *Biomedical and Chemical Engineering* (2012)

#####
**Roles of particle-wall and particle-particle interactions in highly confined suspensions of spherical particles being sheared at low Reynolds numbers** (with Andreas Acrivos and Philippe Peyla), *Physics of Fluids* (2011)

The roles of particle-wall and particle-particle interactions are examined for suspensions of spherical particles in...

#####
**A kinetic theory for particulate systems with bimodal and anisotropic velocity fluctuations** (with Shailesh S. Ozarkar, Volodymyr I. Kushch, and Donald L. Koch), *Physics of Fluids* (2008)

Observations of bubbles rising near a wall under conditions of large Reynolds and small Weber...

#####
**A method for determining Stokes flow around particles near a wall or in a thin film bounded by a wall and a gas-liquid interface** (with Shailesh S. Ozarkar), *Physics of Fluids* (2008)

A method for determining Stokes flow around particles near a wall or in a thin...

#####
**Impedance probe to measure local gas volume fraction and bubble velocity in a bubbly liquid** (with R. Zenit and D. L. Koch), *Review of Scientific Instruments* (2003)

We have developed a dual impedance-based probe that can simultaneously measure the bubble velocity and...

#####
**Mass transfer coefficients for laminar longitudinal flow in hollow-fibre contactors** (with Sangkyun Koo), *Journal of Fluid Mechanics* (2003)

We consider the problem of predicting the rate of mass transfer to a fluid flowing...

#####
**Effective-medium theories for predicting hydrodynamic transport properties of bidisperse suspensions** (with Sangkyun Koo), *Physics of Fluids* (2002)

Effective-medium theories for predicting conditionally averaged velocity field and hydrodynamic transport coefficients of monodisperse suspensions...

#####
**Finite-Weber-number motions of bubbles through a nearly inviscid liquid** (with Volodynmyr I. Kushch, Peter D. M. Spelt, and Donald L. Koch), *Journal of Fluid Mechanics* (2002)

A method is described for computing the motion of bubbles through a liquid under conditions...

#####
**Attenuation of sound in concentrated suspensions: theory and experiments** (with Peter D. M. Spelt, Michael A. Norato, Margaret S. Greenwood, and Lawrence L. Tavarides), *Journal of Fluid Mechanics* (2001)

Ensemble-averaged equations are derived for small-amplitude acoustic wave propagation through non-dilute suspensions. The equations are...

#####
**Measurements of the average properties of a suspension of bubbles rising in a vertical channel** (with Roberto Zenit and Donald L. Koch), *Journal of Fluid Mechanics* (2001)

Experiments were performed in a vertical channel to study the behaviour of a monodisperse bubble...

#####
**Numerical simulation of a gas–liquid flow in a fixed bed** (with Sangkyun Koo), *Physics of Fluids* (2001)

A countercurrent gas–liquid flow through a fixed bed of spherical particles is examined numerically by...

#####
**Particle pressure and marginal stability limits for a homogeneous monodisperse gas-fluidized bed: kinetic theory and numerical simulations** (with Donald L. Koch), *Journal of Fluid Mechanics* (1999)

A linear stability analysis is performed for the homogeneous state of a monodisperse gas-fluidized bed...

#####
**Determination of particle size distributions from acoustic wave propagation measurements** (with Peter D. M. Spelt, Michael A. Norato, and Lawrence L. Tavlarides), *Physics of Fluids* (1999)

The wave equations for the interior and exterior of the particles are ensemble averaged and...

#####
**Birkman screening and the covariance of the fluid velocity of fixed beds** (with Donald L. Koch and Reghan J. Hill), *Physics of Fluids* (1998)

The phenomenon of Brinkman screening, whereby the fluid velocity disturbance produced by each particle in...

#####
**Nusselt number for flow perpendicular to arrays of cylinders in the limit of small Reynolds and large Peclet numbers** (with Wei Wang), *Physics of Fluids* (1997)

The problem of determining the Nusselt number N, the nondimensional rate of heat or mass...

#####
**Rheology of dense bubble suspensions** (with Sang-Yoon Kang, Heng-Kwong Tsao, and Donald L. Koch), *Physics of Fluids* (1997)

The rheological behavior of rapidly sheared bubble suspensions is examined through numerical simulations and kinetic...

#####
**An O(N) algorithm for Stokes and Laplace interactions of particles** (with Guobiao Mo), *Physics of Fluids* (1996)

A method for computing Laplace and Stokes interactions among N spherical particles arbitrarily placed in...

#####
**Simple shear flows of dense gas-solid suspensions at finite Stokes numbers** (with Guobiao Mo, Heng-Kwong Tsao, and Donald L. Koch), *Journal of Fluid Mechanics* (1996)

We examine the problem of determining the particle-phase velocity variance and rhe-ology of sheared gas-solid...

#####
**Numerical simulations of the effect of hydrodynamic interactions on diffusivities of integral membrane proteins** (with Travis L. Dodd, Daniel A. Hammer, and Donald L. Koch), *Journal of Fluid Mechanics* (1995)

Proteins in a biological membrane can be idealized as disks suspended in a thin viscous...

#####
**A method for computing Stokes flow interactions among spherical objects and its application to suspensions of drops and porous particles** (with Guobiao Mo), *Physics of Fluids* (1994)

A method for computing Stokes flow interactions in suspensions of spherical objects is described in...

#####
**Inclusion of lubrication forces in dynamic simulations** (with Guobiao Mo), *Physics of Fluids* (1994)

A new method is described for incorporating close-field, lubrication forces between pairs of particles into...

#####
**Dispersed-phase stress tensor in flows of bubbly liquids at large Reynolds numbers** (with A. K. Didwania), *Journal of Fluid Mechanics* (1993)

We derive averaged equations for large Reynolds number laminar flows of gas–liquid dispersions accounting for...

#####
**Dynamic simulations of flows of bubbly liquids at large Reynolds numbers** (with A. K. Didwania), *Journal of Fluid Mechanics* (1993)

Results of dynamic simulations of bubbles rising through a liquid are presented. The Reynolds number...

#####
**Linear acoustic properties of bubbly liquids near the natural frequency of the bubbles using numerical simulations** (with R. Sureshkumar), *Journal of Fluid Mechanics* (1993)

We consider the problem of determining linear acoustic properties of bubbly liquids near the natural...

#####
**A pairwise interaction theory for determining the linear acoustic properties of dilute bubbly liquids**, *Journal of Fluid Mechanics* (1991)

The problem of determining the acoustic properties of dilute bubbly liquids is examined using the...

#####
**The added mass, Basset, and viscous drag coefficients in nondilute bubbly liquids undergoing small-amplitude oscillatory motion** (with D. Z. Zhang and A. Prosperetti), *Physics of Fluids A: Fluid Dynamics* (1991)

The motion of bubbles dispersed in a liquid when a small-amplitude oscillatory motion is imposed...

#####
**Conductivity of N-Dimensional Composites Containing Hyperspherical Inclusion**, *SIAM Journal on Applied Mathematics* (1990)

A problem of determining the macroscopic or effective thermal conductivity of an N-dimensional composite medium...

#####
**The planar singular solutions of Stokes and Laplace equations and their application to transport processes near porous surfaces** (with S. Behl), *Physics of Fluids A: Fluid Dynamics* (1989)

The planar singular solutions of Stokes and Laplace equations are derived and applied to a...

#####
**Periodic solutions for three sedimenting spheres** (with Russel E. Caflisch, Chjan Lim, and Jonathan H. C. Luke), *Physics of Fluids* (1988)

Exact periodic solutions are found for the relative motion of three spheres sedimenting in a...

#####
**Transport processes in random arrays of cylinders. I. Thermal conduction** (with C. Yao), *Physics of Fluids* (1988)

A numerical method is developed that takes into account the many particle interactions in a...

#####
**Transport processes in random arrays of cylinders. II. Viscous flow** (with C. Yao), *Physics of Fluids* (1988)

A numerical method is developed that takes into account the many-particle interactions in a rigorous...