Chisholm correlation

Chisholm correlation Apf= Apfj Orientation Flow pattern n B ... 

This can be readily integrated numerically as long as we use the appropriate nonequilibrium equivalent specific volume in the integration. A reasonably simple form for has been suggested by Chisholm (1983), which makes use of estabhshed correlations for the slip velocity K, which depends on the Lockhart-Martinelh parameter X. Integrating Eq. (26-118) gives ... 

Chisholm, D. Inti. Jl. Heat and Mass Transfer 10 (1967) 1767. A theoretical basis for the Lockharl-Martinelli correlation for two-phase flow. 

Both Baroczy (1965) and Chisholm (1968) have modified the Martinelli-Nelson correlation to take into account the influence of the mass flux. Chisholm s modification is recommended by Collier (1972). Subsequently,... 

Chisholm (1973) presented a convenient form of correlation incorporating his own and Baroczy s modifications. 

Chisholm B, Potyrailo R, Shaffer R, Cawse J, Brennan M, Molaison C (2003) Combinatorial chemistry methods for coating development III. Development of a high-throughput screening method for abrasion resistance correlation with conventional methods and the effects of abrasion mechanism. Prog Org Coat 47 112-119... 

Another modification of the Lockhart-Martinelli approach has been proposed by Chisholm and Laird (C4) to account for the effect of pipe roughness. For the turbulent-turbulent region, it is suggested that the Lockhart-Martinelli correlations, which were presented graphically, can be represented by the equation... 

Chisholm and Laird also measured and correlated the in situ volume-fraction of liquid with an equation of the general form. 

Carey (51) has studied pressure drop and void fraction in different types of compact heat exchangers and has outlined the differences with plain tube geometries. Kreissig and Muller-Steinhagen (52) and Margat et al. (53) have shown that the principles of the methods developed for plain tubes can be used but need to be adapted. The main results of these studies are that the liquid holdup is significantly affected by the mass flow rate (Figure 28) the liquid holdup is underestimated by conventional correlation the two-phase flow multiplier can be estimated from a Chisholm-type correlation. 

Winkelmann et al. (54) have studied air-water flows in a corrugated heat exchanger. Flow visualization and two-phase pressure drop measurements have been performed. The flow visualizations have shown that the flow pattern is complex and that a wavy or a film flow occurs in most cases (Figure 29). The two-phase pressure drop depends on the total flow rate and vapor quality, and Chisholm-type correlation is proposed. More work is required to characterize the flow structure in compact heat exchangers and to develop predictive methods for the frictional pressure drop and the mean void fraction. 

M2. Maddy, S. Q., Chisholm, G. D., Busuttil, A., and Habib, F. K., Epidermal growth factor receptors in human prostate cancer Correlation with histological differentiation of the tumor. Hr. J. 

D. Chisholm, A Theoretical Basis for the Lockhart-Martinelli Correlation for Two-Phase Flow, Int. J. Heat Mass Transfer, 10, pp. 1767-1778, 1967. 

Chisholm, D. (1967) A theoretical basis for lockhart-martineUi correlation for 2-phase flow. Int J. Heat Mass Transfer, 75. 10 (12), 1767. 

Lazarek and Black [67] obtained good predictions of their data by using a value of 30 in the generalized Chisholm/Lockhart-Martinelli correlation for C. Mishima and Hibiki [66] obtained reasonably good predictions for their frictional pressure drop data for air-water flows by correlating the Chrisholm C parameter in the Lockhart-Martinelli correlation as a function of the tube diameter as follows ... 

Bursten BE, Chisholm MH, Clark RJH, Firth S, Hadad CM, Macintosh AM, Wilson PJ, Woodward PM (2002) Oxalate bridged complexes of dimolybdenum and ditungsten supported by pivalate ligands (t-BuC02)3M2( t-02CC02)M2(02C-t-Bu)3. Correlation of the solid-state, molecular and electronic structures with Raman, resonance Raman and electronic spectrtil data. J Am Chem Soc 124 3050-3063... 

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