Browsing by Author "Rahim Jafari"
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Publication 3D numerical modeling of boiling in a microchannel by arbitrary Lagrangian–Eulerian (ALE) method(Elsevier BV, 2016-01) Rahim Jafari; Tuba Okutucu-Özyurt; Jafari, RahimPublication Enhanced photovoltaic panel energy by minichannel cooler and natural geothermal system(Hindawi Limited, 2021-04-06) Rahim Jafari; Kaan T. Erkılıç; Doruk Uğurer; Yunus Kanbur; Murat Ö. Yıldız; Ege B. Ayhan; Jafari, RahimPublication Experimental and numerical study of turbulent flow and thermal behavior of automotive brake disc under repetitive braking(SAGE Publications, 2021-08-13) Rahim Jafari; Kaan T Erkılıç; Ozan Tekin; Recep Akyüz; Mehmet Gürer; Jafari, Rahim; Jafari, RahimThe frictional brake system is the most safety critical equipment to decelerate or stop a vehicle. Thermal performance of the frictional region parts, disc and pads, necessitates to evaluate precisely in the design and test steps. In this study, a brake test setup was designed and fabricated with exactly the same braking components used in a common passenger vehicle as disc, pads, rim, tire, and dust shield to simulate the sequential braking. The local temperature on the disc and pads and the brake fluid pressure were measured. In addition, a three dimensional numerical model was designed to simulate the aerodynamics and thermal performance of the braking in detail. Finite element method was employed to simulate the frictional heat between the brake disc and the pads. The results showed that although the velocity of mainstream airflow reduces significantly into the rim, turbulent flow develops in the form of eddies of swirling airflow. Additionally, transient temperature distribution on the braking components was predicted. The cooling vanes in the brake disc have considerably enhanced the convection heat transfer. The amount of convective heat transfer on the inner radial vanes was more than 58% of the total amount of convective heat transfer.Publication Experimental investigation of surface roughness effects on the flow boiling of R134a in microchannels(Elsevier BV, 2016-12) Rahim Jafari; Tuba Okutucu-Özyurt; Hakkı Özgür Ünver; Özgür Bayer; Jafari, RahimPublication Heat transfer and pressure drop experiments on CMOS compatible microchannel heat sinks for monolithic chip cooling applications(Elsevier BV, 2012-06) Aziz Koyuncuoğlu; Rahim Jafari; Tuba Okutucu-Özyurt; Haluk Külah; Jafari, RahimPublication Investigation of the effectiveness of PCM on the energy saving, thermal comfort and indoor air quality in overcrowded area(Elsevier BV, 2023-11) Fadhil A.M.K. Al-Malaki; Hasanen M. Hussen; Göker Türkakar; Rahim Jafari; Jafari, RahimPublication Modeling and analysis of surface roughness of microchannels produced by μ-WEDM using an ANN and Taguchi method(Springer Science and Business Media LLC, 2017-11) Rahim Jafari; Müge Kahya; Samad Nadimi Bavil Oliaei; Hakkı Özgür Ünver; Tuba Okutucu Özyurt; Jafari, RahimPublication Numerical simulation of flow boiling from an artificial cavity in a microchannel(Elsevier BV, 2016-06) Rahim Jafari; Tuba Okutucu-Özyurt; Jafari, RahimPublication Optimization and energy analysis of a novel geothermal heat exchanger for photovoltaic panel cooling(Elsevier BV, 2021-09) Rahim Jafari; Jafari, RahimPublication Optimization and thermal analysis of radial ventilated brake disc to enhance the cooling performance(Elsevier BV, 2022-02) Rahim Jafari; Recep Akyüz; Jafari, Rahim