Abstract
Numerical simulations using a lattice-gas method (FHP-III) were performed. The method was modified for simulating two miscible fluids into a rectangular cell with obstacles (porous medium) and without obstacles (Hele-Shaw cell). An external force can be applied to each fluid. A suitable combination of this force and initial conditions can develop an unstable interface front (Rayleigh-Taylor instability). A chemical reaction between the fluids was also introduced, with a parameter that controls the reaction rate. The influence of the parameters that control the force and the chemical reaction on the development of the instability was studied.
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