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Description: Flow pattern maps for horizontal diabatic two-phase flow

Reference: Wojtan, L., Ursenbacher, T., Thome, J. R. Investigation of flow boiling in horizontal tubes: Part I - A new diabatic two-phase flow pattern map, International Journal of Heat and Mass Transfer 48 2955-2969, (2005).

Symbols:

Calculate:
Insert saturation temperature (Tsat), mass velocity (G), heat flux (q), tube diameter (D) and press 'Calculate'.

Fluid: R134a Water T_sat (K): G (kg/s/m²): q (W/m²): D (m):

Fluid properties: rhol=1,244.20 kg/m3 cpl=1,375.09 J/(kg.K) mul=0.000220407 Pa.s kl=0.0880 W/(m.K) hlv=186,779.39 J/kg σ=0.0094 N/m	Dimensionless numbers Wel=106.44 Frl=0.43

Heat Transfer Research Group - HTRG
University of Sao Paulo - USP