TY - GEN
T1 - One-dimensional model of a micro heat pipe during steady-state operation
AU - Longtin, Jon P.
AU - Badran, B.
AU - Gerner, Frank M.
PY - 1992
Y1 - 1992
N2 - Micro heat pipes are small scale structures that will be used to cool microelectronic chips. Currently, micro heat pipes of width 100μm are being constructed and tested at the University of Cincinnati. It is expected that these pipes will be able to dissipate heat fluxes on the order of 10 - 15 W/cm2 (100,000 - 150,000 W/m2). This work involves the modeling of a micro heat pipe operating under steady-state conditions. A one-dimensional mathematical model of the evaporator and adiabatic sections is developed and solved numerically to yield pressure, velocity, and film thickness information along the length of the pipe. Interfacial and vapor shear stress terms have been included in the model. Convection and body force terms have also been included in the momentum equation, although numerical experiments have shown them to be negligible for hydraulic diameters on the order of 100μm and water as a working fluid. Results of pressure, velocity, and film thickness are presented along with plots of maximum pipe heat capacity versus pipe length, width, and temperature. Both the scaling and the model results indicate that the maximum heat capacity of the pipe varies with the cube of the hydraulic diameter. A comparison of experimental data from a similar experiment shows good agreement with the model predictions.
AB - Micro heat pipes are small scale structures that will be used to cool microelectronic chips. Currently, micro heat pipes of width 100μm are being constructed and tested at the University of Cincinnati. It is expected that these pipes will be able to dissipate heat fluxes on the order of 10 - 15 W/cm2 (100,000 - 150,000 W/m2). This work involves the modeling of a micro heat pipe operating under steady-state conditions. A one-dimensional mathematical model of the evaporator and adiabatic sections is developed and solved numerically to yield pressure, velocity, and film thickness information along the length of the pipe. Interfacial and vapor shear stress terms have been included in the model. Convection and body force terms have also been included in the momentum equation, although numerical experiments have shown them to be negligible for hydraulic diameters on the order of 100μm and water as a working fluid. Results of pressure, velocity, and film thickness are presented along with plots of maximum pipe heat capacity versus pipe length, width, and temperature. Both the scaling and the model results indicate that the maximum heat capacity of the pipe varies with the cube of the hydraulic diameter. A comparison of experimental data from a similar experiment shows good agreement with the model predictions.
UR - https://www.scopus.com/pages/publications/0027046347
M3 - Conference contribution
AN - SCOPUS:0027046347
SN - 0791809269
T3 - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
SP - 23
EP - 33
BT - Heat Transfer on the Microscale
PB - Publ by ASME
T2 - 28th National Heat Transfer Conference and Exhibition
Y2 - 9 August 1992 through 12 August 1992
ER -