دکتر مصطفی پیرمرادیان نجف‌آبادی

دانشیار

گروه تاریخ
دانشکده ادبیات و علوم انسانی

پست الکترونیکی

m.pirmoradian@ltr.ui.ac.ir

آدرس

دانشگاه اصفهان میدان آزادی اصفهان، ایران
کد پستی : 8174673441

معرفی کلی

برونداد‌های پژوهشی

همه موارد

مقالات

مقالات لاتین

2025

Combining heat exchangers and metal foam and phase change materials for increased energy storage and heat generation using an exhaust heater: An experimental investigation

( Article . )

Zhang, Q., Li, X., Ali, A.B., Sawaran singh, N.S., Yazdekhasti, A., Pirmoradian, M., Marzouki, R.

Case Studies in Thermal Engineering (2214157X)72

Coupling effects of strain gradient and surface energy on dynamic instability of small-scale timoshenko beams traversed by sequential moving nanoparticles

( Article . Gold )

Sawaran singh, N.S., Ali, A.B., Abed hussein, M., Mohammed, J.K., Kharraji, O., Pirmoradian, M., Hashemian, M., Salahshour, S.

Case Studies in Chemical and Environmental Engineering (26660164)11

Modeling the effects of pressure and magnetic field on the phase change of sodium sulfate/magnesium chloride hexahydrate in nanochannels

( Article . Gold )

Ali, A.B., Hussein, R.A., Sawaran singh, N.S., Salahshour, S., Pirmoradian, M., Mohammad sajadi s., S.M., Deriszadeh, A.

International Journal of Thermofluids (26662027)26

Non-local piezoelasticity to incorporate the influence of small-scale factors on the resonance behavior of the Mindlin piezoelectric polymeric nanoplates

( Article . Gold )

Sawaran singh, N.S., Hassan, W.H., Ameen ahmed, Z.M., Al-zahy, Y.M.A., Salahshour, S., Pirmoradian, M.

Case Studies in Chemical and Environmental Engineering (26660164)11

Numerical simulation of combined convective heat transfer in a sinusoidal cavity with lid-driven cap affected by fractal blocks

( Article . Gold )

Abdolvand, R., Yoosefzadeh, S., Jaffar, H.A., Abdul-redha, H.K., Akbari, O.A., Ahmadi, G., Salahshour, S., Pirmoradian, M.

International Journal of Thermofluids (26662027)26

Improving the thermal performance of equipment on large and small scales is one of the most important issues in engineering. In this numerical study, the flow and combined convection heat transfer in a two-dimensional (2D) sinusoidal cavity affected by the movement of indirect hot fluid flow are investigated using the finite volume method. By using water/silver nanofluid in volume fractions (φ) of 0 to 0.06 and using fractal surfaces in a 2D cavity with a lid-driven cap in Richardson numbers (Ri) 0 to10, an attempt is made to increase the heat transfer efficiency of the sinusoidal hot surface. The results of this research show that due to the increase in the convective heat transfer coefficient resulted from the strengthening of the fluid velocity, a significant decrease in the temperature of the hot surface is achieved. At Ri = 10, due to the slower movement of the cap and the full compliance of the fluid with the sinusoidal surface, the heat penetration in the fluid layers increases and the temperature graphs become more uniform. The flow circulation between the two hot and cold sources is affected by the density gradients in the cooling fluid and the movement of the cap can create a different temperature distribution. The fluid temperature distribution is also dependent on moving areas in the cavity. The placement of fluid on fractal surfaces is associated with extreme velocity changes. Due to the presence of viscosity and the formation of the velocity boundary layer, this behavior also affects the movement of the fluid layers to the solid surface areas. The highest value of the Nusselt number (Nu) is gained during fluid contact with a cold lid-driven cap on the left side of the cavity. As the fluid moves further on the surfaces of the moving cavity, the hot fluid gradually exchanges its energy with the cavity cover and the fluid cools down. The presence of solid nanoparticles in a higher φ has a significant effect on reducing the temperature of the hot surface, which is due to the increase in the thermal conductivity of the cooling fluid. Compared to the base fluid, this behavior at φ = 0.06 has created a higher thermal efficiency increase of about 15 %. The lowest shear stress is related to the areas of fluid separation on the curved surface. In all investigated cases, the increase of φ can increase the average shear stress between 35 % and 43 % in different Ri. © 2024