TY - JOUR
T1 - Effect of convection on a propagating front with a solid product
T2 - Comparison of theory and experiments
AU - Bowden, Gina
AU - Garbey, Marc
AU - Ilyashenko, Victor M.
AU - Pojman, John A.
AU - Solovyov, Stanislav E.
AU - Taik, Ahmed
AU - Volpert, Vitaly A.
PY - 1997/1/23
Y1 - 1997/1/23
N2 - We studied ascending fronts of acrylamide polymerization in dimethyl sulfoxide in which the reactants in solution are converted to a gel at a higher temperature than the solution. We have calculated the stability boundary (the critical viscosity at which convection occurs) as a function of the front velocity. We found that in a two-dimensional system the presence of walls does stabilize the front compared to an infinite plane, but the shape of the boundary is not affected. Experimental fronts exhibited antisymmetric convection for low viscosities and low front velocities, as predicted by our calculations. However, the experimentally determined boundary differed significantly from the calculated ones, the experimental fronts being more stable. The shapes of the boundaries differ, and we propose this is caused by the temperature dependence of the viscosity, which is not treated in our analysis.
AB - We studied ascending fronts of acrylamide polymerization in dimethyl sulfoxide in which the reactants in solution are converted to a gel at a higher temperature than the solution. We have calculated the stability boundary (the critical viscosity at which convection occurs) as a function of the front velocity. We found that in a two-dimensional system the presence of walls does stabilize the front compared to an infinite plane, but the shape of the boundary is not affected. Experimental fronts exhibited antisymmetric convection for low viscosities and low front velocities, as predicted by our calculations. However, the experimentally determined boundary differed significantly from the calculated ones, the experimental fronts being more stable. The shapes of the boundaries differ, and we propose this is caused by the temperature dependence of the viscosity, which is not treated in our analysis.
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U2 - 10.1021/jp962354b
DO - 10.1021/jp962354b
M3 - Article
AN - SCOPUS:0030734210
VL - 101
SP - 678
EP - 686
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 4
ER -