To solve the problem of low processing efficiency screw helical raceway by using high-efficiency grinding technology, this paper carried out theoretical, simulation, and experimental analyses on temperature which mainly affects selection process parameters. First, based distribution characteristics allowance raceway, analysis shows that geometry contact area is trapezoidal. Then, existing trian...

In this paper, mini-channel type evaporator which is new in mobile air conditioning (MAC) or automotive air conditioning (AAC) systems is thermally modeled. The performance of mini-channel evaporator is also compared with the laminated evaporator which is being currently used in automotive industries. The mini-channel evaporator was constructed of two rows of parallel flow mini-channel tubes...

Trapezoidal cross-sectional spiral microfluidic channels showed high resolution and throughput in cell separation bio-applications. The main challenges are the complexity cost of fabrication process trapezoidal on micro-scale. In this work, we present application grayscale channel design to overcome process. We also use direct engraving with a CO2 laser beam polymethyl methacrylate (PMMA) mater...

in this paper, collapse behavior of simple and reinforced thin-walled channel- section beams, subjected to three- point bending, is investigated. many simple channel- section beams of different geometry and some reinforced ones were tested, and their strengths after collapse were obtained thoroughly. since the available theories in this area are complicated and little attention has been paid to...

in this article, stress analysis and energy estimation during cold-roll forming of symmetrical channel sections have been discussed. geometry of sheet strip is pre-estimated by a shape function. then longitudinal, transversal and shear strains have been calculated. using both the levy-mises and the prandtl reuss equations, and also considering the bauschinger effect, stress distributions have b...

to simulate a new economical architecture for pem fuel cell and investigate the effectiveness of the introduced structure on the performance, computational fluid dynamics (cfd) code is used to solve the equations for a single domain of the cell namely: the flow field, the mass conservation, the energy conservation, the species transport, and the electric/ionic fields under the assumptions of st...