Effect of a constant heat source on evaporative instability in a solid-liquid-vapor system

When a liquid underlies its own vapor, convection mav arise due to evaporation without gravitv or surface tension gradient effects. This process is named as pure evaporative convection, In this study, Standard linear stabilitv of a solid-liquid-vapor svstem considering an evaporative liquid into its own vapor is investigated, A constant heat source is considered in the solid part of the svstem and the effect of that heat source on the linear stabilitv is studied, Inputs to the svstem are the constant heat, the depths of the solid, the liquid and the vapor and the phvsieal parameters, which are assumed to be constant while the output is the temperature difference at which convection starts, The aim is to parametrically analyze this svstem and compare it with a liquid-vapor svstem where the bottom plate is kept at constant hot and upper plate at constant low temperature, In the study, the effect of the heat source number, which appears in the energv balance equation for the solid part, the solid depth, the liquid and the vapor flows on the critical evaporation number and dispersion curve are examined, It is concluded that the vapor flow stabilizes the svstem while the heat source number, the liquid flow and the solid depth destabilize the svstem.