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Chemically Enhanced Immiscible Fluid Displacements

Event Type
fluid mechanics
Department of Mechanical Science & Engineering
2005 Mechanical Engineering Laboratory (Deere Pavilion)
Sep 15, 2017   12:00 - 1:00 pm  
Professor Thomas Ward, Department of Aerospace Engineering, Iowa State University
Holly Foster
Originating Calendar
MechSE Seminars


Chemically Enhanced Immiscible Fluid Displacements





Date & Time

Professor Thomas Ward

Department of Aerospace Engineering

Iowa State University


Friday, September 15, 2017                    12:00 P.M.


2005 Mechanical Engineering Lab (Deere)




The chemically enhanced displacement of otherwise immiscible fluids within a porous media is presented using experiments and computation.  Experiments were conducted using an aqueous alkali solution to displace a vegetable oil in a pre-filled capillary tube (diameter < 1 mm).  Fluid displacement experiments were performed to estimate the residual oil film left on the wall of a capillary tube as a function of Reynolds (Re), viscous Atwood (At), capillary (Ca), Peclet (Pe) and Damkohler (Da) numbers.  The surface tension between the aqueous alkali and oil phases decreases with an in- crease in alkali concentration, which beyond a critical concentration forms a stable micro-emulsion.  Separately we measured the shear viscosity of the micro-emulsion as a function of alkali and aqueous/oil concentrations.  We also attempted to measure a bulk diffusion coefficient of the emulsion in both phases.  Computation using species conservation for each phase i.e. aqueous alkali, vegetable oil and emulsion, with a source term used to generate the emulsion in a series of A + B → C type chemical reactions, was performed.  A comparison between the experiments and computation will be presented.


About the Speaker

Thomas Ward is currently an assistant professor in the Aerospace Engineering Department at Iowa State University.  He received his BS in Chemical Engineering from Missouri S&T (formerly University of Missouri – Rolla), MS in Chemical Engineering from Stanford University, PhD in Mechanical Engineering from University of California at Santa Barbara.  He then went on to work as a postdoctoral researcher at Harvard University in the School of Engineering and Applied Sciences for two years and also the University of California at Los Angeles in the Department of Mathematics.  Prior to joining Iowa State University, he was as Assistant professor in the Department of Mechanical and Aerospace Engineering at North Carolina State University.  His research interests are in fluid mechanics and he utilizes experiments, computation and theory to explore problems in this area.



Host:   Professor Charles Schroeder, Chemical and Biomolecular Engineering

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