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New Heat Transfer Research Study Findings Reported from Shanghai Jiao-Tong University (A CHF model for saturated pool boiling on a heated surface...

August 5, 2014



New Heat Transfer Research Study Findings Reported from Shanghai Jiao-Tong University (A CHF model for saturated pool boiling on a heated surface with micro/nano-scale structures)

By a News Reporter-Staff News Editor at Journal of Technology -- Data detailed on Heat Transfer Research have been presented. According to news reporting originating from Shanghai, People's Republic of China, by VerticalNews correspondents, research stated, "A theoretical model is developed to predict the critical heat flux in pool boiling on a heated surface with micro/nano structures based on a force balance analysis, with effects of the capillary wicking force and modification of the critical instability wavelength taken into consideration. An analytical expression for CHF of a heated surface with micro/nano-size structures is obtained in terms of the surface roughness factor, the solid fraction as well as the contact angle explicitly."

Our news editors obtained a quote from the research from Shanghai Jiao-Tong University, "It is shown that geometric parameters of these micro/nano structures influence the ability of liquid spreading on a hydrophilic surface, effectively supplying liquid to the heated surface, and thus delaying the occurrence of the CHF. The micro/nano-sized cavities provide additional sites for vapor formation, altering the critical distance between vapor columns and thus reducing the critical instability wavelength. The critical wavelength for the occurrence of critical heat flux is obtained based on the change in surface free energy."

According to the news editors, the research concluded: "The predicted values of CHF on heated surfaces with micro/nano-size structures in pool boiling obtained from the present model are found in agreement with existing experimental data."

For more information on this research see: A CHF model for saturated pool boiling on a heated surface with micro/nano-scale structures. International Journal of Heat and Mass Transfer, 2014;76():452-458. International Journal of Heat and Mass Transfer can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; International Journal of Heat and Mass Transfer - www.elsevier.com/wps/product/cws_home/210)

The news editors report that additional information may be obtained by contacting X.J. Quan, Shanghai Jiao Tong University, MOE Key Lab Power Machinery & Engn, Sch Mech Engn, Shanghai 200240, People's Republic of China. Additional authors for this research include L.N. Dong and P. Cheng.

Keywords for this news article include: Asia, Shanghai, Heat Transfer Research, People's Republic of China

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Source: Journal of Technology


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