Instability of Non-Stoichiometric Chemically Reactive Miscible Slice in Porous Media

Abstract:

Conclusions (continuing work)

• Viscous fingering develops even in an initially stable system ( ) as a result of chemical reaction.

• The more unstable cases lead to higher mixing lengths and consequently to higher rate of slice disappearance.

• The strongest instability is observed when the viscosity of the product (C) is between the viscosity of the two reactants (A & B).

• In the case where the viscosity of the displacing fluid (A) is between the viscosity of the slice (B) and the product (C), no fingers grow on the upstream or downstream of the flow. This case shows slower rate of slice disappearance.

• In any other viscosity arrangements, depending on the viscosity ratios,the fingers develop toward downstream or upstream. This results in more spreading of the product and higher rate of slice disappearance.

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