The utilization of the spiral tube heat exchanger (SHE) has become increasingly prevalent in large-scale liquefaction processes. However, flow pattern and frictional pressure drop two-phase have been scarcely studied, particularly under offshore sloshing conditions. An experimental system had developed to explore characteristics mixed hydrocarbon fluid a tube. Moreover, these order examine effe...

This paper is devoted to study the effects of pressure drop in heat exchangers on the dynamics of a free piston Stirling engine. First, the dynamic equations governing the pistons as well as the gas pressure equations for hot and cold spaces of the engine are extracted. Then, by substituting the obtained pressure equations into the dynamic relationships the final nonlinear dynamic equations gov...

The study of flow liquids in a circular pipe has been studied for long time. theoretical and numerical analysis viscous fluid is very important the field physics, engineering even medicine. In any flow, Napier-Stokes equation are to nature flow. On basis Reynold number, either classified as laminar or turbulent. When heat supplied with liquid having velocity, rate volume, temperature gradient, ...

According to flexibility of pneumatic conveying systems with respect to other types of transmission systems, this system has wide application in industry and agriculture processes. One important application of this system is in the loading and unloading tankers and powdery bulk materials such as trucks carrying cement, plaster and sand. Conveying efficiency is associated with pressure, which in...

The optimal design of a plate-fin recuperator of a 200-kW microturbine was studied in this paper. The exergy efficiency, pressure drop and total cost were selected as the three important objective functions of the recuperator. Genetic Algorithm (GA) and Non-dominated Sorting Genetic Algorithm (NSGA-II) were respectively employed for single-objective and multi-objective optimizations. By opt...

The study aims at quantifying the effect of fluid elasticity on frictional pressure drop for the flow of viscoelastic fluid through a helical coil. Aqueous solutions of polyacrylamide (PAA) in the concentration range 0.25 %–0.5 % (wt/vol.) were used as test fluids. The fluids were characterized using dynamic rheometer under rotational and oscillatory modes. The rheological study depicts that th...

0017-9310/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.ijheatmasstransfer.2011.04.028 ⇑ Corresponding author. E-mail addresses: [email protected], maa59@ URL: http://www.mohsenakbari.com (M. Akbari). This paper outlines a novel approximate model for determining the pressure drop of laminar, singlephase flow in slowly-varying microchannels of arbitrary cross-section based on the solu...