Transient temperature response of the crossflow heat exchangers with finite wall capacitance and both fluids unmixed is investigated numerically for step, ramp and exponential perturbations provided in hot fluid inlet temperature. Effect of two-dimensional longitudinal conduction in separating sheet and axial dispersion in fluids on the transient response has been investigated. Conductive heat transport due to presence of axial dispersion in fluids have been analyzed in detail and shown that presence of axial dispersion in both of the fluid streams neutralizes the total conductive heat transport during the energy balance. It has also been shown that the presence of axial dispersion of high order reduces the effect of longitudinal conduction.
Transient Behavior of Crossflow Heat Exchangers With Longitudinal Conduction and Axial Dispersion
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division January 13, 2003; revision received March 2, 2004. Associate Editor: N. K. Anand.
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Mishra, M., Das, P. K., and Sarangi, S. (June 16, 2004). "Transient Behavior of Crossflow Heat Exchangers With Longitudinal Conduction and Axial Dispersion ." ASME. J. Heat Transfer. June 2004; 126(3): 425–433. https://doi.org/10.1115/1.1738422
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