نتایج جستجو برای: 30zn tube
تعداد نتایج: 96555 فیلتر نتایج به سال:
Nowadays, tube bonding in vehicles structure is noticeably considered by many researches. In this paper, local tube compression process by a rubber ring has been studied. Firstly, simulation of the process was performed by FEM. Then, experimental test has been carried out to validate the numerical results. Numerical and experimental results were compared showing a good agreement. In the second ...
Nowadays, tube bonding in vehicles structure is noticeably considered by many researches. In this paper, local tube compression process by a rubber ring has been studied. Firstly, simulation of the process was performed by FEM. Then, experimental test has been carried out to validate the numerical results. Numerical and experimental results were compared showing a good agreement. In the second ...
Background: Nasogastric tube (NG tube) usage was first described in 1921 by Levin. Surgeons routinely use NG tube in most esophageal resections. Considering the numerous complications caused by this tube, the uncertainty about its usefulness and the scarcity of studies conducted on the subject, particularly in esophageal cancer patients, we investigated the necessity of the NG tube in these cas...
iniencephaly is a rare kind of neural tube defect that is classified into two types of iniencephaly apertus and iniencephaly clausus. this anomaly could be diagnosed prenatally by obstetric ultrasonography and terminated by therapeutic abortion; however, it could be undiagnosed until birth similar to our case due to the abnormal position of the fetus or lack of experience of the sonographer. du...
background: sound is one of the most important factors threatening workers’ health. the most efficient and practical method for controlling noise pollution is the use of sound-absorbing materials. impedance tube with two microphones is used to determine the sound absorption coefficients and should be tested periodically for accuracy and efficiency. the purpose of present study was assessing the...
background: human hydatid disease is caused by echinococcus granulosus and has a global distribution. it mainly affects the liver, but can involve other organs. in this paper, we present a case of a primary hydatid cyst of the fallopian tube. case presentation: a 69-year-old (gravida 16, para 16 woman) with abdominal pain and urinary frequency was presented to the gynecology clinic of imam khom...
In this study, the effect of the tube material on the thermal stress generated in a vertical shell and tube heat exchanger is investigated. Shell and tube heat exchangers are the most common heat exchangers used in industries. One of the most common failures in these exchangers in the industry is the tube failure at the junction of the tube to tubesheet. When the shell side and the tube side fl...
An Experimental Study of Nanofluids Operated Shell and Tube Heat Exchanger with Air Bubble Injection
Shell and Tube heat exchangers are the heat exchangers that are most widely used in industries and for other commercial purposes. There are many techniques that have been utilized to enhance the heat transfer performance of the shell and tube heat exchangers. Air bubble injection is one of the promising and inexpensive techniques that can create turbulence in the fluids resulting in to enhancem...
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