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- W4313893190 abstract "In this Letter, we study the interaction between a self-sustaining exothermic reaction front propagating in a direction perpendicular to that of gravity and the buoyancy-driven convective flow during frontal polymerization (FP) of a low-viscosity monomer resin. As the polymerization front transforms the liquid monomer into the solid polymer, the large thermal gradients associated with the propagating front sustain a natural convection of the fluid ahead of the front. The fluid convection in turn affects the reaction-diffusion (RD) dynamics and the shape of the front. Detailed multiphysics numerical analyses and particle image velocimetry experiments reveal this coupling between natural convection and frontal polymerization. The frontal Rayleigh (Ra) number affects the magnitude of the velocity field and the inclination of the front. A higher Ra number drives instability during FP, leading to the observation of thermal-chemical patterns with tunable wavelengths and magnitudes.Received 28 June 2022Revised 17 October 2022Accepted 5 December 2022DOI:https://doi.org/10.1103/PhysRevLett.130.028101© 2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasPattern formationPolymerizationPhysical SystemsFront propagationReaction diffusion systemsInterdisciplinary PhysicsNonlinear DynamicsFluid DynamicsPolymers & Soft Matter" @default.
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- W4313893190 date "2023-01-09" @default.
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- W4313893190 title "Buoyancy-Induced Convection Driven by Frontal Polymerization" @default.
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- W4313893190 doi "https://doi.org/10.1103/physrevlett.130.028101" @default.
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