Abstract
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.
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Bessonov, N., Volpert, V.A., Pojman, J.A. et al. Numerical simulations of convection induced by Korteweg stresses in miscible polymermonomer systems. Microgravity Sci. Technol 17, 8–12 (2005). https://doi.org/10.1007/BF02870969
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DOI: https://doi.org/10.1007/BF02870969