图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
强化传热期刊
影响因子: 0.562 5年影响因子: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN 打印: 1065-5131
ISSN 在线: 1026-5511

强化传热期刊

DOI: 10.1615/JEnhHeatTransf.v10.i1.80
pages 95-117

Multiplicity Analysis of Pin Fins Under Multiboiling Conditions

Rizos N. Krikkis
Institute of Chemical Engineering and High Temperature Chemical Processes, Patras, Greece
Stratis V. Sotirchos
Professor, Department of Chemical Engineering, University of Rochester, Rochester, New York, USA, and Research Director, Institute of Chemical Engineering and High Temperature Chemical Processes, Patras, Greece
Panagiotis Razelos
College of Staten Island, CUNY, New York, New York, USA

ABSTRACT

A numerical bifurcation analysis is carried out in order to determine the solution structure of pin fins subject to multiboiling heat transfer mode. The thermal analysis depends on the working fluid because the heat transfer coefficient is temperature dependent and includes the convective, the nucleate, the transition, and the film boiling regimes. The heat transfer process is modeled using one-dimensional heat conduction with or without heat transfer from the fin tip. Five fin profiles are considered: the cylindrical, the trapezoidal, the triangular, the convex parabolic, and the parabolic. The multiplicity structure is obtained in order to determine the different types of bifurcation diagrams, which describe the dependence of a state variable of the system (for instance, fin temperature or heat dissipation) on a design (conduction—convection parameter) or operation parameter (base temperature difference). Specifically, the effects of the base temperature difference, of the conduction-convection parameter, and of the Biot number are analyzed and presented in several diagrams and compared with experimental data available in the literature.


Articles with similar content:

NATURAL CONVECTION HEAT TRANSFER FROM PIN FIN HEAT SINKS WITH A HORIZONTAL BASE
International Heat Transfer Conference 13, Vol.0, 2006, issue
Ruth Letan, D. Sahray, Gennady Ziskind, Vadim Dubovsky, R. Magril
RANGES AND LIMITATIONS OF OPTIMUM DESIGN FOR CONVECTING-RADIATING ANNULAR FINS OF TRAPEZOIDAL PROFILE
International Heat Transfer Conference 13, Vol.0, 2006, issue
Y. Wang, L. T. Yeh, Benjamin T. F. Chung, Y. Zhou
TRANSIENT PERFORMANCE OF COOLING FINS SUBJECT TO STEP INITIAL CONDITIONS
International Heat Transfer Conference 10, Vol.15, 1994, issue
Haim Kalman , E. Assis
Prediction of Temperature Distribution of Spine Fins with an Arbitrary Profile
Journal of Enhanced Heat Transfer, Vol.15, 2008, issue 4
G. Ramamurthy, S. Ravi Kumar
GLOBAL EFFECTIVENESS OF PULSATING HEAT PIPE HEAT EXCHANGERS: MODELING AND EXPERIMENTS
Heat Pipe Science and Technology, An International Journal, Vol.1, 2010, issue 3
Vivek Silwal, Sameer Khandekar, Pavan K. Sharma, Ashutosh Bhatnagar