Figure 4-2:Phase indicators, phase change temperature, and transition interval. The mass fraction,αm, is defined fromρ1,ρ2andθaccording to: It is equal to−1⁄2before transformation and1⁄2after transformation. The specific heat capacity is the sum of an equivalent heat capacityCeq:...
transition heat -retaining formula solar water heating system, include the media rotation subassembly of constituteing by hot pond of phase transition heat -retaining (3) and wet return, set up the control assembly on the wet return, with solar collector (11) of returning water piping ...
Theoretically applying non-steady-state heat conduction equations, kinetics of phase transformation and equivalent inclusion theory knowledge is derived out of the crack-tip stress theory of phase transition of phase-change region formula. Theoretical calculations show that: phase transition of crac ...
The phase-change problem is solved by the migration-collision scheme of lattice Boltzmann method. After formula derivation, we find that this method can gi... L Xia,L Yang,Y Xu,... - 《Theoretical & Applied Mechanics Letters》 被引量: 8发表: 2011年 Modeling of thermal flows in a medium...
Department of Building ScienceScience in China Series EYinping Zhang,Xin Wang. Analysis of solid-liquid phase change heat transfer enhancement[J]. Science in China Series E: Technological Science . 2002 (6)Wang X,Zhang Y P.Analysis of solid-liquid phase change heat transfer enhancement. ...
The figure below illustrates the process of phase and temperature change for water.Heating/cooling process for water. Sensible heat formula Now that you know the definition of sensible heat, let's look at the sensible heat formula. The sensible heat is a function of temperature difference, the ...
Thus, the effect of film boiling heat transfer mechanism on heat transfer process of heat exchanger with grooves should be considered. The HTC of film boiling could be calculated by the flowing empirical formula, (9)hm=0.62⋅kg⋅g⋅ρghlv⋅Prg0.25⋅ρf−ρg0.25l0.75⋅μg0...
It can be seen from the figure that the specific heat capacity of nanofluids increased with elevated temperatures where the specific heat capacity of base fluid (water) has no significant change with increasing temperature. Also, it should be noted that the specific heat capacity values of hybrid...
The micro layer evaporation is expressed in terms of vapor volume, active nucleation site density, liquid density, latent heat of vaporization and bubble departure frequency. Paul and Abdel-Khalik [26] expressed boiling heat flux by considering heat flux due to phase change, natural convection and...
Generally, the thermal energy being transferred includes the sensible energy in single-phase flows and the latent energy in phase-change flows16,28,32. We first examine the case of the convective heat flux vector and entropy flux vector in single-phase flows. Considering the Gibbs equations, Max...