نتایج جستجو برای: inner tube flow

تعداد نتایج: 643521  

2014
Ami Nomura Ken Imanishi Yukinori Taniguchi Etsuko Ueda Tadahiro Wada Shinichi Enoki

Recently, there have been a lot of earthquakes in Japan. It is necessary to promote seismic isolation devices for buildings. The devices have been hardly diffused in attached houses, because the devices are very expensive. We should develop a low-cost seismic isolation device for detached houses. We suggested a new seismic isolation device which uses a two-layer circular tube as a unit. If hyst...

2013
David JP O'Callaghan Duncan Wyncoll

experience has compelled us to write this letter as several patients, referred to our hospital and labelled slow-weaners, made rapid progress when upsized to a larger internal diameter (ID) tracheostomy. Accelerated weaning with larger ID tracheostomies is partially explained by physical principles. Flow through the airways (natural and artifi cial) is both turbulent and laminar. Flow through a...

Journal: :journal of heat and mass transfer research(jhmtr) 2014
seyed faramarz ranjbar mir hatef seyyedvalilu

helical coil heat exchangers are widely used in industrial applications ranging fromcryogenic processes, air-conditioning, and nuclear reactors to waste heat recovery due totheir compact size and high heat transfer coefficient. in this kind of heat exchangers, flowand heat transfer are complicated. this paper reports a numerical investigation of theinfluence of different parameters such as coil...

2014
Yuki Yoshinaga Hao Peng Chaobin Dang Eiji Hihara Yuki YOSHINAGA Hao PENG Chaobin DANG Eiji HIHARA

Many studies were carried out to investigate the flow and heat transfer characteristics of two-phase flow in microchannels because of its advantage in improving heat exchange performance, it has been well revealed that liquid film thickness and flow pattern play important roles in determining the heat transfer characteristics. However, these data is still limited to understanding properties of ...

2013
M. Tarawneh

Two-phase frictional pressure drop data were obtained for condensation of carbon dioxide in single horizontal micro tube of inner diameter ranged from 0.6 mm up to 1.6 mm over mass flow rates from 2.5*10 to 17*10 kg/s and vapor qualities from 0.0 to 1.0. The inlet condensing pressure is changed from 33.5 to 45 bars. The saturation temperature ranged from -1.5 C up to 10 C. These data have then ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان 1390

in iran we already use laminate tubes only in cosmetics industry. laminate tube manufacturers via using the most modern technology of the world, faced with the laminate tube market being saturated in cosmetics industry for packaging the cosmetic creams and toothpaste. but considering the great food market and therefore laminate tube features such as beautiful packaging, ease of use for the fina...

Journal: :Nano letters 2007
Cristina E Giusca Yann Tison Vlad Stolojan Ewa Borowiak-Palen S Ravi P Silva

Evidence for modified electronic structure in double-walled carbon nanotubes with respect to their individual inner and outer constituent single-walled nanotubes is provided by scanning tunneling microscopy and spectroscopy experiments. The contribution originating from the inner tube to the local density of states of the double-walled system was identified in agreement with previous theoretica...

2011
M. Venkatesan Sarit K. Das A. R. Balakrishnan

0894-1777/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.expthermflusci.2010.12.007 ⇑ Corresponding author. Tel.: +91 44 2257 4154. E-mail address: [email protected] (A.R. Balakrishna The effect of tube diameter on two-phase frictional pressure drop was investigated in circular tubes with inner diameters of 0.6, 1.2, 1.7, 2.6 and 3.4 mm using air and water. The gas and liquid superficial...

Journal: :international journal of energy and environmental engineering 2011
s hossainpour r hassanzadeh

this paper presents a three-dimensional numerical investigation carried out in turbulent forced convection in a tube with helical ribs. enhancement of heat transfer using helically corrugated tubes has beenstudied experimentally by many researchers but there exist a few published numerical analyses results. the paper also introduces the results of heat transfer and friction factor data for inco...

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