Numerical Simulations of Convection Induced by Korteweg Stresses in Miscible Polymer-Monomer Systems
Chemistry and Biochemistry
We modeled a miscible polymer-monomer system with a sharp transition zone separating the two fluids to determine if convection analogous to Marangoni convection in immiscible fluids could occur because of thermal and concentration gradients. We considered three cases: with a temperature gradient along the transition zone, with a variable transition zone width, and one with a gradient in the conversion of polymerization. Using the Navier-Stokes equations with an additional term, the Korteweg stress term arising from non-local interactions in the fluid, we demonstrated with realistic parameters that measurable fluid flow would result in the absence of buoyancy-driven convection for all three cases. To avoid buoyancy-driven convection, the experiment would have to be performed in microgravity.
Microgravity Science and Technology
Volpert, V. A.,
Pojman, J. A.,
Zoltowski, B. D.
(2005). Numerical Simulations of Convection Induced by Korteweg Stresses in Miscible Polymer-Monomer Systems. Microgravity Science and Technology, 17(1), 8-12.
Available at: http://aquila.usm.edu/fac_pubs/9086