It has been a few years since I have written anything on this blog. There are reasons… But this year I am on sabbatical leave, so perhaps I will get back to posting regularly. I’m spending the first two months of my leave working with Simon Rogers in the Department of Chemical and Biomolecular Engineering at the University of Illinois at Urbana-Champaign. Simon has lots of good ideas about things rheological which I would like to understand better. So far, I’m getting involved in a couple of projects with Simon’s grad students relating to thixotropic suspensions and gelation. I’m also pursuing an idea of my own, which ties in nicely with some of Simon’s work. Time will tell if it’s a good idea, or not, but it is so nice to have the time to work on it!
Our new MCR 302 rheometer was installed this week, and we were all trained in how to use it by Jean-Francois and Melina. Here’s Nirosh having a close look at the instrument.
I spent some time at UBC last spring collaborating with Ian Frigaard and his students Kamran Alba and Mohammad Taghavi. A paper based on that work entitled “Incomplete fluid-fluid displacement of yield-stress fluids. Part 2: Highly inclined pipes” by K. Alba, S. M. Taghavi, J. R. de Bruyn, and I. A Frigaard has now been accepted for publication in the Journal of Non-Newtonian Fluid Mechanics. I enjoyed helping Kamran, Mohammad, and Ian sort out the very complicated behaviour they observed in their experiments.
I had a productive 10 days in Hong Kong. I enjoyed some good food, did some hiking, and explored some of the city’s interesting neighbourhoods. I also explored the limits of my laptop’s memory by running Monte Carlo simulations for 10 million time steps. We made some good progress with our model for restricted diffusion, although, as always, there is still some work to do.
I am leaving early Friday morning for 10 days in Hong Kong. I will be visiting Jonathan Wylie in the Department of Applied Mathematics at City University of Hong Kong. Jonathan and I are working on a very math-y project related to restricted diffusion, something that is very relevant to our work on microrheology, among other things.
We had a paper accepted today: “Numerical investigation of the inclined pullout behavior of anchors embedded in clay,” by Ahmed M. Fahmy, John R. de Bruyn, and T. A. Newson has been accepted for publication in Geotechnical and Geological Engineering. Ahmed was a grad student in Civil and Environmental Engineering who was co-supervised by Tim Newson and me. How did I come to be involved in numerical modeling of anchors? The sediment on the ocean floor is non-Newtonian and thixotropic. Unfortunately it was too complicated to include non-Newtonian behavior in our models, but maybe next time!
Brian and I got a tour of London’s Pottersburg Wastewater Treatment Plant on Friday. Lots of good fluid dynamics there, but parts of it were aesthetically unpleasant! This tour was related to some research we are doing with a local company.