Scientific Research Publishing

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52858#.VKs-g8nQrzE Author(s)    Shin-Ichi Morita 1 , Yasutaka Hayamizu 1 , Takanobu Yamada 2 , Akihiko Horibe 3 , Naoto Haruki 3 , Toshiaki Setoguchi 4 , Kazuma Adachi 5 Affiliation(s) 1 Department of Mechanical Engineering, National Institute of Technology, Yonago College, Yonago, Japan . 2 Department of Mechanical Engineering, Kitami Institute of Technology, Kitami, Japan . 3 Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan . 4 Department of Advanced Technology Fusion, Saga University, Saga, Japan . 5 Graduate School of Machine Creative Engineering, Nagaoka University of Technology, Nagaoka, Japan . ABSTR...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47028#.VGLy92fHRK0 Author(s) Claudia Zimmermann , Rodion Groll Affiliation(s) Center of Applied Space Technology and Microgravity, University of Bremen, Bremen, Germany . Center of Applied Space Technology and Microgravity, University of Bremen, Bremen, Germany . ABSTRACT In this paper a numerical study of a turbulent, natural convection problem is performed with a compressible Large-Eddy simulation. In a natural convection the fluid is accelerated by local density differences and a resulting pressure gradient. Directly at the heated walls the temperature distribution is determinate by increasing temperature gradients. In the centr...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50604#.VEdC4VfHRK0 Author(s) Olivier Serret Affiliation(s) ESIM Engineer—60 rue de la Marne, Cugnaux, France . ABSTRACT The traditional thermodynamic theory explains the reversible phenomena quite well, except that reversible phenomena are rare or even impossible in practice. Here the purpose is to propose an explanation valid for reversible and also irreversible phenomena, irreversibility being common or realistic. It previously exposed points tricky to grasp, as the sign of the work exchange, the adiabatic expansion in vacuum (free expansion) or the transfer of heat between two bodies at the same temperature (isothermal transfer). Af...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50299#.VDSdWFfHRK0 Author(s)      Hyo Sik Kim 1 , Jin Ho Kim 1 , Chan Gi Lee 1 , Suk Hwan Kang 1* , Kwang Jae Woo 2 , Ho Jin Jung 2 , Dong Wook Kim 3* Affiliation(s) 1 Plant Engineering Center, Institute for Advanced Engineering (IAE), Gyongki-do, Korea . 2 DAEWOONG E & S, Daejeon, Korea . 3 Department of Environmental Engineering, Kongju National University, Cheonan, Korea . ABSTRACT Heat transfer and bubble phenomena were investigated by adopting the drift flux model in a viscous slurry bubble column reactor (SBCR), having a diameter of 0.0508 m(ID) and height 1.5 m. The effects of superficial gas velocity (0.002 -0.164 m/s), solid conc...