امین رضا نقره آبادی
دانشیار، گروه مهندسی مکانیک، دانشکده مهندسی، دانشگاه شهید چمران اهواز، اهواز
[ 1 ] - مدل‌سازی میکرو بایوحسگر آمپرسنج ساندویچی با لایة حفرهدار
مدل ریاضی دوبعدی میکرو بایوحسگر ساندویچی با لایههای حفرهدار و انتخابی، ارائه و تحلیل شده است. مدل بایوحسگر حاضر شامل حفرههایی در ابعاد میکرو یا نانومتر است، که به‌صورت کامل یا بخشی از آن‌ها توسط آنزیم پر شده است. این مدل بر‌اساس سیستم معادلات واکنش- نفوذ، ارائه شدهاست. معادلات حاکم بر بایوحسگر ساندویچی حفرهدار با درنظر گرفتن واکنش آنزیمی میکائیلیس- منتن، استخراج شده است ...
[ 2 ] - An experimental investigation of performance of a 3-D solar conical collector at different flow rates
The shape of a solar collector is an important factor in solar-to-thermal energy conversion. Conical shape is one of the stationary and symmetric shapes that can be employed as a solar water heater. Flow rate of working fluid on the solar collector has an important effect on the efficiency of the collector. The present study is an experimentally investigated of the performance of the solar coni...
[ 3 ] - Effect of magnetic field on the boundary layer flow, heat, and mass transfer of nanofluids over a stretching cylinder
The effect of a transverse magnetic field on the boundary layer flow and heat transfer of anisothermal stretching cylinder is analyzed. The governing partial differential equations for themagnetohydrodynamic, temperature, and concentration boundary layers are transformed into a setof ordinary differential equations using similarity transformations. The obtained ordinarydifferential equations ar...
[ 4 ] - تحلیل ناپایداری استاتیکی و دینامیکی پولین نانومحرک‌های دوسر گیردار نیمه متأثر: تأثیر الکترود زیرلایه
تحقیقات بسیار زیادی پیرامون مدل‌سازی ناپایداری‌های سیستم‌های میکرو/نانو الکترومکانیکی با اندازه یکسان دو الکترود متحرک و زیرلایه تاکنون انجام شده است، ولی پژوهشی که مدل‌سازی ناپایداری پولین استاتیکی (PI) و دینامیکی (PID) میکرو/نانومحرک‌ها را با وجود الکترود زیرلایه کوتاه‌تر (نیمه‌متأثر) و با درنظر گرفتن اثرات مقیاس کوچک مورد بررسی قرار بدهد یافت نشده است. در پژوهش حاضر، رفتار استاتیکی و دینام...
[ 5 ] - A numerical investigation of heat transfer and pressure drop in a novel cylindrical heat sink with helical minichannels
This study numerically investigated heat transfer and fluid flow characteristics in a novel cylindrical heat sink with helical minichannels for the laminar flow of fluid with temperature-dependent properties. A finite volume method was employed to obtain the solution of governing equations. The effects of helical angle, channel aspect ratio, and Reynolds number, which were regarded as main para...
[ 6 ] - Solving Single Phase Fluid Flow Instability Equations Using Chebyshev Tau- QZ Polynomial
In this article the instability of single phase flow in a circular pipe from laminar to turbulence regime has been investigated. To this end, after finding boundary conditions and equation related to instability of flow in cylindrical coordination system, which is called eigenvalue Orr Sommerfeld equation, the solution method for these equation has been investigated. In this article Chebyshev p...
[ 7 ] - Stability analysis of stratified two-phase liquid-gas flow in a horizontal pipe
This study aimed at linear stability analysis of the stratified two-phase liquid-gas flow in a horizontal pipe. First, equations governing the linear stability of flow in each phase and boundary conditions were obtained. The governing equations were eigenvalue Orr Sommerfeld equations which are difficult and stiff problems to solve. After obtaining the velocity profiles of the gas and liquid ph...
[ 8 ] - The effect of SiO2 nanoparticle on the performance of photovoltaic thermal system: Experimental and Theoretical approach
The low conversion efficiency of solar cells produces large amounts of thermal energy to the cells, and with an increase in the temperature of solar cells, their electrical efficiency decreases. Therefore, a hybrid photovoltaic thermal system improves the overall efficiency of the system by adding thermal equipment to the solar cell and removing excessive heat from these cells. In this paper, w...