A theory of dropwise condensation

Tekin, Hasan Fehmi


A study of laminar forced film condensation of vapor flowing in cross-flow direction through the annular space between two concentric cylinders
Atılgan, Ahmet Koray; Yamalı, Cemil; Department of Mechanical Engineering (2006)
In this study laminar forced film condensation of vapor flowing in cross-flow direction through the annular space between two concentric cylinders was investigated numerically. To achieve this, governing equations of the vapor and the condensate flow in cross-flow direction between two concentric cylinders were developed. After obtaining the equations in integral forms by using the finite difference technique the vapor boundary layer thicknesses on the inner and outer cylinders and the condensate layer thic...
Numerical investigation of solidification
Alrmah, Masoud; Dursunkaya, Zafer; Department of Mechanical Engineering (2005)
Finite element solution of solidification process in 2-D Cartesian and axisymmetric geometries is investigated. The use of finite element may result in spurious increase of temperature in the field and the selection of the mushy zone range when used as a numerical tool along with the selection of the mesh size results in large errors in the predicted solidification time. The approach works best for problems where the mushy zone range is finite and the thermal conductivities of both phases are high.
Experimental investigation of R134a flow in a 1.65 mm copper minitube
Tekin, Bilgehan; Güvenç Yazıcıoğlu, Almıla; Kakaç, S.; Department of Mechanical Engineering (2011)
This thesis investigates the refrigerant (R-134a) flow in a minitube experimentally. The small scale heat transfer is a relatively new research area and has been in favor since the end of 1970’s. Refrigerant flow in mini- and microscale media is a potential enhancement factor for refrigeration technology in the future. For the forthcoming developments and progresses, experimental studies are invaluable in terms of having an insight and contributing to the establishment of infrastructure in the field in addi...
Design, fabrication, and experimental evaluation of microchannel heat sinks in cpu cooling
Koyuncuoğlu, Aziz; Okutucu Özyurt, Hanife Tuba; Arınç, Faruk; Department of Mechanical Engineering (2010)
A novel complementary metal oxide semiconductor (CMOS) compatible microchannel heat sink is designed, fabricated, and tested for electronic cooling applications. The proposed microchannel heat sink requires no design change of the electronic circuitry underneath. Therefore, microchannels can be fabricated on top of the finished CMOS wafers by just adding a few more steps to the fabrication flow. Combining polymer (parylene C) and metal (copper) structures, a high performance microchannel heat sink can be ea...
Reallocation of household resources for energy saving behavior
Çelebi, Ayşe N; Erbuğ, Çiğdem; Department of Industrial Design (2011)
This study focuses on persuasive design concerning the household users’ energy saving behavior while using electrical household appliances for the housework. Household users form a balance at home determined by the household resources they have, and they do not want to change this fragile balance because it is established as a result of household users’ habitual behavior. It is crucial to persuade household users to save energy at home without disturbing the balance among resources. Persuasion becomes an ef...
Citation Formats
H. F. Tekin, “A theory of dropwise condensation,” M.S. - Master of Science, Middle East Technical University, 2005.