This repository contains the data associated with the paper "Steady-State Diffusion in a Spatially Varying Porous Medium" to be published in Advances in Water Resources. These data include the information and program scripts required to reproduce the results reported in the publication. In particular, the data set includes (1) COMSOL...
Quantification of macroscale transport phenomenon in microfluidic systems is important to many science and engineering disciplines. In part, this is because fully resolved solutions to microscale balance laws over large domains are out of reach with current computational technology. Additionally, engineers are most often interested in some upscaled quantity and...
A steady-state, liquid-liquid contactor, which was a
modified version of a cell Previously developed by Godfrey,
was constructed for the study of interphase mass transfer.
In particular, the contactor was developed in order to
eliminate problems encountered while studyinpg ternay
systems with the conventional Lewis cell.
The system, water-benzoic acid...
A cascade crosscurrent column, packed with Pall rings, was
employed for carbon dioxide absorption from a carbon dioxide-rich
air phase by contacting with water. Absorption efficiency was
presented as the percentage of CO₂ removed versus gas flow rates for
constant liquid to gas ratios (L/G).
Curves were developed for an...
A cascade crosscurrent column, packed with Pall rings, was employed
for ammonia absorption from ammonia-rich air phase by
contacting with water. Absorption efficiency was presented as
the percentage of NH₃ removed as well as the volume of a transfer
unit.
A review of the literature concerning the theoretical and experimental...
Public concern has recently focused upon the presence
of radioactive radon in homes. The Environmental
Protection Agency and others have researched this health
hazard. Radon gas is given off during typical household
water uses such as showering, bathing, dishwashing, and
clothes washing. However, few studies have been performed
on radon...
A complete solution, exact to second-order, for wave motion
forced by a hinged-wavemaker of variable-draft is presented. A
solution for a piston type wavemaker is also obtained as a special
case of a hinged-wavemaker with negative infinite draft. The
existing Stokes inviscid theories for mass transport is extended to
include...
A contactor has been designed and constructed for experimental
studies of mass transfer with or without chemical reaction between
two fluid phases. The contactor is flexible enough to investigate a
wide range of variables affecting mass transfer coefficients. It is
easy to operate; it could be operated either as a...
The effect of unsteady thermocapillary convection on the mass transfer rate of a solute between two immiscible liquids within a rectangular microscale channel with differentially heated sidewalls was numerically investigated. A computational fluid dynamic code in Fortran77 was developed using the finite volume method with Marker and Cell (MAC) technique...
A direct numerical simulation of advection-diffusion in a sinusoidal tube was
carried out using the commercial finite-volume code STAR-CD. The Reynolds
numbers varied from Re = 0.1 to Re = 14.5. At the larger Reynolds numbers,
steady-state eddies formed in the diverging sections and significantly influenced
the macroscale dispersion. Long...
The conventional advection-dispersion equation cannot adequately describe all processes driving
solute transport in heterogeneous systems. This dissertation focuses on the individual influences
of both chemical (Chapter 2) and physical processes (Chapters 3 and 4) which affect
solute transport. In Chapter 2 we analyzed uranium transport in natural sediment using the...
The parallel implementation of a large number of functional units is necessary for
any industrial scale microfluidic process. The concept of a 'numbering up'
strategy where a single highly optimized functional unit that has a low individual
production is replicated a large number of times to create a device that...