an:01502337
Zbl 0971.76083
Fontana, D. M.; Corcione, M.; Lo Monaco, A.; Santarpia, L.
Laminar free convection from a vertical plate in partly dissociated gases
EN
Int. J. Heat Mass Transfer 43, No. 7, 1113-1120 (2000).
00063298
2000
j
76R10 76N15 76V05 80A20
steady free convection; isothermal vertical plate; reversible fast reaction of dissociation; atmospheric pressure; effective properties; boundary-layer equations; correlation
Summary: Two-dimensional steady free convection from an isothermal vertical plate is studied in a gas where a reversible fast reaction of dissociation \(A\leftrightarrow 2B\) takes place at atmospheric pressure. The effective properties in the presence of dissociation are evaluated. The governing boundary-layer equations are solved numerically for a wide range of values of the independent variables. All the data obtained are correlated by a single correlation, even if the temperature interval in the boundary layer \((T_w, T_\infty)\) is allowed to vary in a wide range, both in relative location and width, in respect to the temperature interval of dissociation. The correlated dimensionless parameters include the ratio \(\rho_w/\rho_\infty\) and are defined through the mixture effective properties calculated at \(T_w\) and \(T_\infty\). The maximum absolute value of relative error depends essentially on two parameters: \(\alpha\) related to variations of fraction of moles, and effective mass density \(\rho^*\) in the boundary layer.