Peer-reviewed Articles

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

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...

 

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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...