Home – Home – Jornals – Thermophysics and Aeromechanics 2026 number 4

The work is devoted to studying the dependence of the boiling process on a porous heater on the force of gravity using a numerical hybrid model based on the method of lattice Boltzmann equations and the heat transfer equation. To test the model, we first studied the dynamics of the growth and separation of a single bubble during boiling on a single flat heater at various values of the gravitational acceleration (from 0.2 g to normal g). The obtained dependences of the separation diameter, separation frequency and average heat flow on the force of gravity confirmed qualitative agreement with the data available in the literature. As a result of modeling the boiling process on a porous heater with an ordered structure of solid heat-conducting rectangular elements, boiling curves and the dependence of the heat transfer degradation coefficient on the thermal pressure were obtained for various values of the acceleration of gravity. It is shown that with a decrease in gravity, the heat flux removed from the porous heater decreases throughout the entire range of thermal pressures, and the boiling crisis begins at a lower thermal pressure.