An experimental study on non-isothermal miscible displacements in Hele-Shaw cells

Non-isothermal miscible displacements in Hele-Shaw cells are experimentally investigated. This is done by the more-viscous liquids at room temperature being displaced by the less-viscous liquids at high temperature, 353K. Fundamental characteristics are presented on how the effects of non-isothermal field on the miscible displacement patterns are varied by the following factors, the viscosity of the less-viscous liquid at ,293K, \textit{$\mu $}$_{l,20}$, the growth rate of the pattern, $R$, the growth time of the pattern, $t$, and the gap width of the cell,$b$. The effects of non-isothermal fields on the pattern (1) do not monotonically varied with \textit{$\mu $}$_{l,20}$, and become significant in a certain limited range of \textit{$\mu $}$_{l,20}$. (2) increase with $R$ in the present experimental condition. (3) decrease with $t$ in the present experimental condition. (4) do not monotonically varied with $b$. The experimental results is able to be explained by the cooling model of the less-viscous liquids due to heat loss to the plates consisting of the cell.