A theory-based prediction method was used to estimate the friction factor and heat transfer rate in turbulent flow of a helically coiled tube. The secondary produced by centrifugal force improves mass transfer; therefore, spiral coil pipes are widely variety industrial applications. law wall Reynolds analogy, which states that momentum is equivalent transfer, were this theoretical method. logar...

the present paper was aimed to study the effects of variable thermal conductivity and heat generation on the flow of a viscous incompressible electrically conducting fluid in the presence of a uniform transverse magnetic field, thermal radiation, porous medium, mass transfer, and variable free stream near a stagnation point on a non-conducting stretching sheet. equations of continuity, momentum...

in natural gas treatment, the removal of co2 and h2s in acid gases is a critical concern. there are various purification technologies that can be used for the removal of acid gas impurities. absorption of acid gas into amines is one preferred method in gas industries. in the past, single amines was used, but recently in order to improve absorption performance, mixed amines with different solubi...

effect of methanol concentration and channel depth of bipolar plates on the performance of single direct methanol fuel cell was investigated experimentally. the membrane used in this experiment was nafion117. dimension of the single cell were 10cm 10 cm. methanol concentrations of 0.50, 1.0, 1.5, 2.0, 3.0 molar were used. channel depth of the bipolar plates were chosen to be 1.0, 1.5, 2.0 mm, a...

background: there has been an increase in number of obese infertile females booked for advanced infertility treatment procedures like in vitro fertilization (ivf) and intra cytoplasmic sperm injection (icsi). the knowledge of impact of body mass index (bmi) on reproductive outcome can help to counsel these patients. objective: to compare reproductive outcome in females of different bmi after ic...

In this paper a numerical method is used to study the unsteady state natural convection heat transfer within a confined porous media with uniform internal heat generation. The governing equations based on the Darcy model and Bossiness approximations are solved, using the finite difference Alternating Direction Implicit (ADI) method. The developed program was used to simulate natural convection ...