Yazar "Markal, Burak" için listeleme
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The combined effects of filling ratio and inclination angle on thermal performance of a closed loop pulsating heat pipe
Markal, Burak; Aksoy, Kübra (Springer, 2021)In the present study, a series of experiments are conducted to investigate the thermal performance of a copper made pulsating heat pipe consisting of uniform flow passages with the cross section of 2 mm x 2 mm. Test ... -
Combined influence of artificial nucleation site and expanding cross section on flow boiling performance of micro pin fins
Markal, Burak; Kul, Beyzanur (Elsevier, 2022)Present paper experimentally studies combined influence of artificial nucleation sites and expanding cross section on saturated flow boiling performance of heat sinks with micro pin fins. Thermal and visualization-based ... -
Comparative investigation of different types of expanding micro-pin-fin heat sinks at low mass flux
Markal, Burak; Kul, Beyzanur; Aydın, Orhan (Elsevier, 2023)Expansion of cross-sectional area of flow passages in micro-pin-fin heat sinks provides advantages due to suppression of bubble-confinement problem. However, low mass flux in addition to orientation of fins and existence ... -
Conical coaxial impinging air jets: angle effect on the heat transfer performance
Markal, Burak; Avcı, Mete; Aydın, Orhan (Springer, 2020)Herein, an experimental attempt is conducted to research thermal and flow behaviors of an impinging jet exiting from a coaxial type nozzle with a conical outer and a circular inner outlets. the experiments include four ... -
Çarpan Eş Eksenli Bir Hava Jetinde Debi Oranının Akış Karakteristikleri Üzerine Etkisinin Deneysel Olarak İncelenmesi
Markal, Burak (2018)Bu çalışmada, dairesel ve halkasal eş eksenli akış pasajlarına sahip bir lüleden çıkarak dairesel bir plaka üzerine çarpan jetin hidrodinamik karakteristikleri deneysel olarak incelenmiştir. Deneyler üç farklı Reynolds ... -
Dönmeli Eş Eksenli Çarpan Jetlerde Isı Transferinin Deneysel İncelenmesi
Markal, Burak; Aydın, Ali Orhan (2020)Bu deneysel çalışmada, dönmeli eş eksenli çarpan jet akışlarının ısı transfer karakteristikleri incelenmiştir. Deneyler, farklı debi oranları (Q* = 0,4 ve 0,7) ve boyutsuz lüle-plaka mesafelerinde (H/D = 1, 2 ve 3) yapılmış ... -
Düşük dolum oranında ikili karışımlarla yüklü üniform olmayan atımlı ısı borusunun deneysel incelenmesi
Markal, Burak; Varol, Ramazan (Düzce Üniversitesi, 2021)Bu çalışmada, düşük bir dolum oranında ikili karışımlarla yüklü, üniform olmayan kanal profiline sahip düz plakalı kapalı döngülü atımlı bir ısı borusunun ısıl performansı ve akış davranışı deneysel olarak incelenmiştir ... -
Effect of a new type staggered pin fin configuration on flow boiling characteristics of micro-heat sinks
Markal, Burak; Kul, Beyzanur (Springer, 2023)Flow boiling in micro-pin fn structured heat sinks is an up-to-date thermal management technique. However, due to microsized fow passages, bubble blockage is a problem for this type of heat sinks, too. In addition, mixing ... -
Effect of double cross sectional ratio on performance characteristics of pulsating heat pipes
Markal, Burak; Candere, Ayşe Candan; Avcı, Mete; Aydın, Orhan (Elsevier, 2021)Effect of double cross sectional ratio on performance characteristics of pulsating heat pipes is experimentally investigated. The cross sectional ratios in the evaporator and condenser sides are different from each other, ... -
Effect of gradually expanding flow passages on flow boiling of micro pin fin heat sinks
Markal, Burak; Kul, Beyzanur; Avcı, Mete; Varol, Ramazan (Elsevier, 2022)In this paper, effect of gradually expanding flow passages on saturated flow boiling characteristics of micro pin fin heat sinks is experimentally investigated. In this regard, a comparative analysis is performed based on ... -
Effect of hydraulic diameter on flow boiling in rectangular microchannels
Markal, Burak; Aydın, Orhan; Avcı, Mete (Springer, 2019)An experimental study is conducted to investigate the effect of hydraulic diameter on the saturated flow boiling characteristics of deionized water in parallel rectangular microchannels. Experiments have been performed for ... -
Effect of inlet temperature on flow boiling behavior of expanding micro-pin-fin type heat sinks
Markal, Burak; Evcimen, Alperen; Aydın, Orhan (Elsevier, 2023)Heat sinks that cool electronic systems through flow boiling are exposed to working fluids at different inlet temperature. Therefore, in the present study, influence of inlet temperature on boiling performance of a ... -
Effect of intermittent interruption of fluid supply on flow boiling phenomenon in micro-pinned heat sinks
Markal, Burak; Evcimen, Alperen (Elsevier, 2024)Among promising cooling options, flow boiling in micro-structures is a strong alternative. However, for systems operating under very high heat loads, any shortage or discontinuity of working fluid can lead to irreversible ... -
The effect of Total flowrate on the cooling performance of swirling coaxial impinging jets
Markal, Burak (Springer, 2019)Thermal management ability of swirling coaxial confined impinging air jets (SCCIAJ) are experimentally studied for different total flowrate. the coaxial structure of the jet is provided by a nozzle which is a cylindrical ... -
Experimental investigation and a new predictive tool for thermal performance of pulsating heat pipes
Markal, Burak; Varol, Ramazan (Springer, 2023)In the present study, binary-fluid-charged uniform and nonuniform flat plate closed loop pulsating heat pipes (FP-CLPHP) are experimentally investigated in comparative manner, and a novel correlation with innovative point ... -
Experimental investigation and force analysis of flat-plate type pulsating heat pipes having ternary mixtures
Markal, Burak; Varol, Ramazan (Pergamon-Elsevier Science Ltd., 2021)Comprehensive experiments are conducted to analyze complex heat transfer characteristics and flow nature of a flat plate closed loop pulsating heat pipe charged with ternary mixtures. Consecutive channels of the heat pipe ... -
Experimental investigation of coaxial impinging air jets
Markal, Burak; Aydın, Orhan (Pergamon-Elsevier Science Ltd, 2018)This study experimentally investigates hydrodynamical and thermal characteristics of coaxial confined impinging turbulent air jets. Various values of the dimensionless nozzle-to-plate distances and dimensionless flowrate ... -
Experimental investigation of flow boiling in single minichannels with low mass velocities
Markal, Burak; Candan, Ayşe; Aydın, Orhan; Avcı, Mete (Pergamon-Elsevier Science Ltd, 2018)Flow boiling characteristics in a single minichannel with the aspect ratio of 2 (1.8 mm width and 0.9 mm height) are studied experimentally. Experiments are conducted for different values of the wall heat flux (in the range ... -
Experimental investigation of heat transfer characteristics and wall pressure distribution of swirling coaxial confined impinging air jets
Markal, Burak (Pergamon-Elsevier Science Ltd, 2018)In the present study, swirling coaxial confined impinging turbulent air jets issuing from a novel designed nozzle is studied experimentally. Heat transfer characteristics and pressure distribution on the impingement plate ... -
Experimental study of single-phase fluid flow and heat transfer characteristics in rectangular microchannels
Markal, Burak; Aydın, Orhan; Avcı, Mete (2018)In this study, single-phase laminar flow of deionized water through microchannel heat sinks is investigated experimentally. Heat sinks including twenty-nine parallel rectangular channels have been used as the test samples. ...
