نتایج جستجو برای: new geometrical model
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abstract nowadays, industries cannot play a crucial role in national and international competitions. the tourism industry is no exception. tourism industry development as the most important economic sector and income generation is one of the key challenges of economic development in the world. therefore, countries were successful that take advantage of the capabilities of tourism sector using ...
the main problem of ptolemaic model of the superior planets was related to the “equant point”. it is a geometrical point with respect to which the motion of the deferent sphere is uniform. but it cannot be acceptable on the basis of aristotle's philosophy on the motions of celestial spheres. astronomers of maragha school devised some new models to avoid this problem, while they were in acc...
In this paper, a novel approximate solution to determine the Nusselt number for thermally developed, slug (low-prandtl), laminar, single phase flow in channels of arbitrary cross section is presented. Using the Saint-Venant principle in torsion of beams, it is shown that the thermally developed Nusselt number for low-prandtl flow is only a function of the geometrical parameters of the channel c...
Chamber models are wildly used for a screw vacuum pump capacity calculation. Those allow to take into account lot of factors which have great influence on the capacity, and working power. The first stage chamber models’ development is mathematic description geometrical parameters. This paper presents time-depending parameters, such as volume, areas suction discharge ports, gaps gas leakage goes...
A Response surface design of experiment has been performed based on the Muschelknautz method of modeling (MM) for 64 test cases using Box-Behnken design to study the effect of seven geometrical cyclone dimensions on the pressure drop and cut-off diameter. It is found that the most significant geometrical parameters are, the vortex finder diameter, the inlet section width and height, and the cyc...
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