Sima Baheri Islami
Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
[ 1 ] - The effect of increasing the multiplicity of flow fields contact surface on the performance of PEM fuel cell
In this paper, three innovative 3-D geometries for flow fields of cathode and anode have been developed to investigate the comparative impact of increasing the multiplicity of the involved anode-cathode channel surface contact on the efficiency of electrochemical reaction via the same membrane electrode assembly (MEA) active area. In the introduced new models, each anode channel includes two, t...
[ 2 ] - The effect of vertical injection of reactants to the membrane electrode assembly on the performance of a PEM fuel cell
In order to present a new and high performance structure of PEM fuel cell and study the influence of the flow direction and distribution on the rate of reactants diffusion, three novel models of vertical reactant flow injection into the anode and cathode reaction area field have been introduced. They consist of one inlet and two inlets and also a continuous channel. The governing equations on t...
[ 3 ] - The effect of flow parameters on mixing degree of a three dimensional rhombus micromixer with obstacles in the middle of the mixing channel using oscillatory inlet velocities
The previous studies of authors on passive micromixers indicated that the micromixers dividing the flow to several layers, such as rhombus micromixers and micromixers with obstacles in the middle of the mixing channel, have higher mixing degree than other types. Also, using of oscillatory inlet velocities is an active method to enhance the mixing efficiency of micromixers. Therefore, in this st...
[ 4 ] - بررسی تجربی رفتار هیدرودینامیکی و شکست جت مایع با و بدون حضور میدان الکتریکی
در کار حاضر، رفتار هیدرودینامیکی جت سیال با و بدون اعمال میدان الکتریکی مطالعه شده و اثر شدت و جهت اعمال میدان الکتریکی بر ناپایداری و شکست جت به روش تجربی مورد بررسی قرار گرفته است. نتایج به‌دست آمده نشان می‌دهند که در جت‌های آزادی که فقط تحت تاثیر گرانش می‌باشند، مشخصات جت سیال وابسته به عدد رینولدز است؛ در این نوع جت‌ها، قطر متوسط جت و طول شکست آن با عدد رینولدز رابطه‌ی مستقیم دارد. اعمال می...
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