Zafer Dursunkaya

E-mail
refaz@metu.edu.tr
Department
Department of Mechanical Engineering
Scopus Author ID
A theoretical framework for comprehensive modeling of steadily fed evaporating droplets and the validity of common assumptions
Akkus, Yigit; ÇETİN, BARBAROS; Dursunkaya, Zafer (Elsevier BV, 2020-12-01)
A theoretical framework is established to model the evaporation from continuously fed droplets, promising tools in the thermal management of high heat flux electronics. Using the framework, a comprehensive model is develop...
On the effect of structural forces on a condensing film profile near a fin-groove corner
Akdag, Osman; Akkus, Yigit; Dursunkaya, Zafer (Elsevier BV, 2020-07-01)
Estimation of condenser performance of two-phase passive heat spreaders with grooved wick structures is crucial in the prediction of the overall performance of the heat spreader. Whilst the evaporation problem in microgroo...
The effect of surface morphology on the rate of phase change of micron and sub-micron sized 2-D droplets
Rezaeimoghaddam, Mohammad; Dursunkaya, Zafer (Informa UK Limited, 2020-01-01)
© 2020 Taylor & Francis.Heat transfer via phase change is a major contributor to heat removal in numerous engineering applications. Thin films of liquid result in increased heat transfer due to a reduction of conduction re...
The effect of disjoining pressure on the shape of condensing films in a fin-groove corner
Akdag, Osman; Akkus, Yigit; Dursunkaya, Zafer (2019-08-01)
Thin film condensation is commonly present in numerous natural and artificial processes. Phase-change driven passive heat spreaders such as heat pipes, which are widely used in electronics cooling, employ a continuous cond...
Limitations of Matching Condensing Film Profile on a Micro Fin with the Groove: Critical Effect of Disjoining Pressure
Alipour, Mobin; Dursunkaya, Zafer (Informa UK Limited, 2019-06-28)
Condensation on a fin top terminating with a groove involves several simultaneous phenomena including vapor-liquid boundaries whose shapes are unknown a priori, fluid flow due to capillary and disjoining pressure gradients...
Experimental Thermal Performance Characterization of Flat Grooved Heat Pipes
Alijani, Hossein; ÇETİN, BARBAROS; Akkus, Yigit; Dursunkaya, Zafer (Informa UK Limited, 2019-06-15)
The thermal characterization of aluminum flat grooved heat pipes is performed experimentally for different groove dimensions. Three heat pipes with groove widths of 0.2 mm, 0.4 mm, and 1.5 mm are used in the experiments. T...
An Iterative Solution Approach to Coupled Heat and Mass Transfer in a Steadily Fed Evaporating Water Droplet
Akkus, Yigit; ÇETİN, BARBAROS; Dursunkaya, Zafer (ASME International, 2019-03-01)
Inspired by the thermoregulation of mammals via perspiration, cooling strategies utilizing continuously fed evaporating droplets have long been investigated in the field, yet a comprehensive modeling capturing the detailed...
PERFORMANCE ASSESSMENT OF COMMERCIAL HEAT PIPES WITH SINTERED AND GROOVED WICKS UNDER NATURAL CONVECTION
Atay, Atakan; Sariarslan, Busra; Kuscu, Yigit F.; Saygan, Samet; Akkus, Yigit; Gurer, A. Turker; Cetin, Barbaros; Dursunkaya, Zafer (2019-01-01)
Heat pipes are widely used in thermal management of high heat flux devices due to their ability of removing high heat loads with small temperature differences. While the thermal conductivity of standard metal coolers is ap...
Effect of design and operating parameters on the thermal performance of aluminum flat grooved heat pipes
Alijani, Hossein; Cetin, Barbaros; Akkuş, Yigit; Dursunkaya, Zafer (Elsevier BV, 2018-03-05)
Four aluminum flat grooved heat pipes with groove widths of 0.2, 0.4, 0.8 and 1.6 mm are fabricated and the effect of filling ratio on the thermal performance is experimentally studied for four different heat flux values o...
Two-dimensional computational modeling of thin film evaporation
Akkuş, Yigit; Tarman, Hakan I.; Cetin, Barbaros; Dursunkaya, Zafer (2017-11-01)
A considerable amount of the evaporation originates from the close vicinity the three-phase contact line in an evaporating extended meniscus due to the low thermal resistance across the ultra thin film. Evaporation taking ...