Chen method

Calculate the convective heat transfer coefficient using simple methods, such as assuming convection only, or Chens method see Section 12.11.3. 

Compute the heat of vaporization using the Chen method. Thus,... 

These determinations were made by the Chen method 31). 

Y.-T. Chen. Method for heat treating shaped articles of amide-imide or amic acid polymers. US Patent 4167 620, assigned to Standard Oil Company (Indiana) (Chicago, IL), September 11, 1979. 

It is at this point that a problem appears in Cherfs method as outlined in his thesis. In order to duplicate his results, the Imig range contribution was calculated on a molality basis, and the local composition model was calculated on a mole fraction basis. This discrepancy was corrected in the paper published in the AIChE Journal (C4) for single electrolyte sdutions. As can be seen in Chapter IV, the Pitzer-Debye-Hiickel expression used for the long range contribution was normalized to the mole fraction basis. Due to these differences, the interaction parameters presented in the paper for use with the Pitzer Debye-Huckel version differ from those presented in the thesis. The AIChE Journal paper notes that a paper on multicomponent solutions was being prepared so this section will be updated later. The Chen method cannot be used in the multicomponent test systems until then. 

H. S. Chen, Method for evaluating viscosities of metallic glasses from rates of thermal transformations, J. Non-Cryst. Solids 27, 257 (1978). 

Smith B.D., Chen J. Implementation, investigation and improvement of a novel cone-beam reconstruction method., IEEE Trans. Med. Imaging, V. 11, 1992, p. 260-266. 

Chen S and Doolen G D 1998 Lattice Boltzmann method for fluid flows Ann. Rev. Fluid Meoh. 30 329-64... 

Chen R Q and Guo H 1996 A general and efficient filter diagonalization method without time propagation J. Chem. Phys. 105 1311... 

The Helgaker-Chen algorithm results in very large steps being possible, and despite the extra cost of the required second derivatives, this is the method of choice for direct dynamics calculations. A number of systems have been treated, and a review of the method as applied to chemical reactions is given in [2]. 

Flow-induced tube vibration occurs at critical fluid velocities through tube banks, and is to be avoided because of the severe damage that can result. Methods to predict and correct vibration problems may be found in Eisinger Trans. ASME J. Pressure Vessel Tech., 102, 138-145 [May 1980]) and Chen J. Sound Vibration, 93, 439-455 [1984]). 

The method for estimating point efficiency, outhned here, is not the only approach available for sieve plates, and more mechanistic methods are under development. For example, Prado and Fair [Ind. Eng. Chem. Re.s., 29, 1031 (1990)] have proposed a method whereby bubbling and jetting are taken into account however the method has not been vahdated tor nonaqueous systems. Chen and Chuang [Ind. Eng. Chem. Re.s., 32, 701 (1993)] have proposed a more mechanistic model for predicting point efficiency, but it needs evaluation against a commercial scale distillation data bank. One can expect more development in this area of plate efficiency prediction. 

X Chen, A Tropsha. A generalized linear response method Application to the hydration free energy calculations. J Comput Chem 20 749-759, 1999. 

This approach is an alternative to quantitative metallography and in the hands of a master gives even more accurate results than the rival method. A more recent development (Chen and Spaepen 1991) is the analysis of the isothermal curve when a material which may be properly amorphous or else nanocrystalline (e.g., a bismuth film vapour-deposited at low temperature) is annealed. The form of the isotherm allows one to distinguish nucleation and growth of a crystalline phase, from the growth of a preexisting nanocrystalline structure. 

Chen ifi-.il. iiaJ S clear Accident Analysis Methods... 

Billinton, R., and Chen, H. (1997). Determination of Load Cari ylng Capacity Benefits of Wind Energy Conversion Systems. Proceedings of the Probabilistic Methods Applied to Power Systems. Stli International Conference September 21-25, 1997. Vancouver, BC, Canada. 

Chen, Ning Hsing, New Fast, Accurate Method to Find Tube-Side Heat Transfer Coefficient, Chem. Eng., June 30, (1958) p. 

Chen, R. S., Cyvin, S. J., Cyvin, B. N., Brunvoll, J., and Klein, D. J. Methods of Enumerating Kekule Structures, Exemplified by Applified by Applications to Rectangle-Shaped Benzenoids. 153, 227-254 (1990). 

Figure 5.47 shows a plot of the ratio of the experimental heat transfer coefficient obtained by Bao et al. (2000) divided by the predicted values of Chen (1966) and Gungor and Winterton (1986) for heat transfer to saturated flow boiling in tubes versus liquid Reynolds number. It can be seen that both methods provide reasonable predictions for Rcls > 500, but that both overpredict the heat transfer coefficient at lower values of Rols- For comparison it was assumed that the boiling term of these correlations is zero. 

As the size of a given fused ring system increases, it becomes more difficult to draw all the canonical forms. For discussions of methods for doing this, see Herndon, W.C. J. Chem. Educ., 1974, 51, 10 Cyvin, S.J. Cyvin, B.N. Brunvoll, J. Chen, R. Monatsh. Chem.,... 

Wu, J. K. and Chen, H. X., Operator Splitting Method to Calculate Pressure of Ultra-Thin Gas Film of Magnetic Head/ Disk," Tribology, Vol. 23, No. 5, 2003, pp. 402-405 (in Chinese). 

Liu QY, Tian M, Ding T, Shi R, Feng YX, Zhang LQ, Chen DF, and Tian W. Preparation and characterization of a thermoplastic poly(glycerol-sebacate) elastomer by two-step method, 2007, 103, 1412-1419. 

---