A Three-Dimensional Numerical Modeling of Atmospheric Pool Boiling by the Coupled Map Lattice Method

摘要: In the present paper, characteristic atmospheric pool boiling curve is qualitatively reproduced for water on a temperature controlled thin copper strip having comparable length and breadth by coupled map lattice (CML) method using three-dimensional field model. The basic objective of work to improve prediction critical heat flux (CHF) with respect 2D CML model Ghoshdastidar et al. (Ghoshdastidar, P. S., Kabelac, Mohanty, A., 2004, "Numerical Modelling Atmospheric Pool Boiling Coupled Map Lattice Method," J. Mech. Eng. Sci., IMechE Part C, 218, pp. 195-205). models saturated at 1 bar large (much larger than minimum wavelength Taylor waves) horizontal strip. height 0.7 mm, indicating film boiling. model, it assumed that governed (a) nucleation from cavities heated surface, (b) thermal diffusion, (c) bubble rising motion associated convection, (d) phase change (e) instability. changes are primarily 3D modeling diffusion distribution nucleating cavity sizes. predicted CHF 1.57 MW/m 2 as compared actual value 1.3 0.36 (see above). It can be said first time which essentially qualitative in nature has been able predict very close value. Furthermore, sensitivity analysis shows gives physically realistic stable results.