Numerical simulation of flow boiling for organic fluid with high saturation temperature in vertical porous coated tube

Yang, Dong; Pan, Jie; Wu, Yanhua; Chen, Tingkuan; Zhou, Chenn Q.

doi:10.1016/j.ijheatfluidflow.2011.05.004

Numerical simulation of flow boiling for organic fluid with high saturation temperature in vertical porous coated tube

Journal Article · Sun Jun 12 04:00:00 EDT 2011 · International Journal of Heat and Fluid Flow

DOI:https://doi.org/10.1016/j.ijheatfluidflow.2011.05.004· OSTI ID:1344396

Yang, Dong ^[1]; Pan, Jie ^[2]; Wu, Yanhua ^[2]; Chen, Tingkuan ^[2]; Zhou, Chenn Q. ^[3]

Xi'an Jiaotong Univ. (China). State Key Lab. of Multiphase Flow in Power Engineering; Purdue University
Xi'an Jiaotong Univ. (China). State Key Lab. of Multiphase Flow in Power Engineering
Purdue Univ. Calumet, Hammond, IN (United States). Dept. of Mechanical Engineering

A semi-analytical model is developed for the prediction of flow boiling heat transfer inside vertical porous coated tubes. The model assumes that the forced convection and nucleate boiling coexist together in the annular flow regime. We used conservations of mass, momentum, and energy to solve for the liquid film thickness and temperature. The heat flux due to nucleate boiling consists of those inside and outside micro-tunnels. To close the equations, a detailed analysis of various forces acting on the bubble is presented to predict its mean departure diameter. Furthermore, the active nucleation site density of porous layer is determined from the pool boiling correlation by introducing suppression factor. The flow boiling heat transfer coefficients of organic fluid (cumene) with high saturation temperature in a vertical flame-spraying porous coated tube are studied numerically. It is shown that the present model can predict most of the experimental values within ±20%. The numerical results also indicate that the nucleate boiling contribution to the overall heat transfer coefficient decreases from 50% to 15% with vapor quality increasing from 0.1 to 0.5.

Research Organization:: Purdue Univ. Calumet, Hammond, IN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Security (NA-70); USDOE National Nuclear Security Administration (NNSA)

DOE Contract Number:: NA0000741

OSTI ID:: 1344396

Journal Information:: International Journal of Heat and Fluid Flow, Journal Name: International Journal of Heat and Fluid Flow Journal Issue: 4 Vol. 32; ISSN 0142-727X

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

References (20)

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Numerical simulation of flow boiling for organic fluid with high saturation temperature in vertical porous coated tube

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