Mathematical modeling and analysis of heat pipe start-up from the frozen state. Final report

Conference · Tue Aug 01 00:00:00 EDT 1989

OSTI ID:5236691

Jang, J H; Faghri, A; Chang, W S; Mahefkey, E T

The start-up process of a frozen heat pipe is described and a complete mathematical model for the start-up of the frozen heat pipe is developed based on the existing experimental data, which is simplified and solved numerically. The two-dimensional transient model for the wall and wick is coupled with the one-dimensional transient model for the vapor flow when vaporization and condensation occur at the interface. A parametric study is performed to examine the effect of the boundary specification at the surface of the outer wall on the successful start-up from the frozen state. For successful start-up, the boundary specification at the outer wall surface must melt the working substance in the condenser before dry-out takes place in the evaporator.

• Research Organization: Wright State Univ., Dayton, OH (USA)
• OSTI ID: 5236691
• Report Number(s): N-89-28747; NASA-CR-185132; E-5028; NAS-1.26:185132; CONF-891208-
• Resource Relation: Conference: Winter annual meeting of the American Society of Mechanical Engineers, San Francisco, CA (USA), 10-15 Dec 1989
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
HEAT PIPES
MATHEMATICAL MODELS
START-UP
ALGORITHMS
BOUNDARY-VALUE PROBLEMS
HEAT FLUX
INTERFACES
LIQUID METALS
PROGRESS REPORT
SIMULATION
TEMPERATURE DISTRIBUTION
WORKING FLUIDS
DOCUMENT TYPES
ELEMENTS
FLUIDS
LIQUIDS
MATHEMATICAL LOGIC
METALS
420400* - Engineering- Heat Transfer & Fluid Flow