Free Convection — Study of the Regular Thermal Mode in Different Layers at the Liquid Height

The rate of cooling (heating) experimental liquids is investigated separately for five thermocouples located at different heights the probe. Research carried out on an stand in system "environment I — body II", where I" water, and "body II" liquid medium a thin metal cylindrical shell under conditions free convection. studied test liquids: sunflower oil, distilled glycerin. analysis processes during convection non-stationary heat exchange out. This paper presents research stand, which consists external vessel, containing environment with temperature t1, internal vessel t2. Accordingly, probes are placed hot cold to take values fixed time Non-stationary conduction occur heating or bodies, substances, gaseous media accompanied by change enthalpy. stationary due source, electric heater, considered laboratory practice determine thermophysical properties materials, bodies substances occurs surrounding air. excess temperature, each thermocouple, along height volume, shows that linearity dependence Ln ϑ = f(τ) preserved, while influence value m manifested. depends layer measured.