Amrollahi Pourshirazi, M., Toghraie, D., Azimian, A. (2015). Study Effect of Deformation Nanochannel Wall Roughness on The Water-Copper Nano-Fluids Poiseuille Flow Behavior. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 8(1), 29-40.
M.M. Amrollahi Pourshirazi; D. Toghraie; A.R. Azimian. "Study Effect of Deformation Nanochannel Wall Roughness on The Water-Copper Nano-Fluids Poiseuille Flow Behavior". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 8, 1, 2015, 29-40.
Amrollahi Pourshirazi, M., Toghraie, D., Azimian, A. (2015). 'Study Effect of Deformation Nanochannel Wall Roughness on The Water-Copper Nano-Fluids Poiseuille Flow Behavior', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 8(1), pp. 29-40.
Amrollahi Pourshirazi, M., Toghraie, D., Azimian, A. Study Effect of Deformation Nanochannel Wall Roughness on The Water-Copper Nano-Fluids Poiseuille Flow Behavior. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2015; 8(1): 29-40.
Study Effect of Deformation Nanochannel Wall Roughness on The Water-Copper Nano-Fluids Poiseuille Flow Behavior
In the nanochannel flow behavior with respect to expand their applications in modern systems is of utmost importance. According to the results obtained in this study, the condition of nonslip on the wall of the nanochannel is not acceptable because in the nano dimensions, slip depends on different parameters including surface roughness. In this study, keeping the side area roughness, deformation effects on fluid flow behavior is investigated. Modeling software open source LAMMPS with equilibrium molecular dynamics simulations have been carried out. Unlike previous studies, existence fluid in laboratory conditions as water-copper nanofluids used. The results showed that rectangular was the most effective and triangular was least effective roughness on flow behavior, resulting in a rough triangular nanochannel slip occurs with more intensity.Existence roughness on the surface increases the number of oscillations in the fluid layer but amplitude near the wall is smooth to rough increased. Nanoparticles also increase the impact on the flow properties
تاثیر هندسه زبری دیواره نانوکانال در رفتار جریان پوازیه نانوسیال آب-مس
Authors [Persian]
محمد میثم امراللهی پورشیرازی, داود طغرایی, احمدرضا عظیمیان
Abstract [Persian]
رفتار جریان داخل نانوکانالها با توجه به گسترده شدن کاربردهای آنها در سیستمهای نوین از اهمیت زیادی برخوردار است. با توجه به نتایج بدست آمده در این تحقیق شرط عدم لغزش روی دیواره نانوکانال، شرط قابل قبولی نیست زیرا لغزش در این ابعاد به پارامترهای متفاوتی از جمله زبری سطح دارد. در این تحقیق با ثابت نگه داشتن مساحت جانبی زبری ، اثر تغییر شکل آن بر روی رفتار جریان سیال بررسی شده است. مدلسازی به کمک نرمافزار متن باز لمس با روش شبیهسازی دینامیک مولکولی تعادلی انجام شده است. برخلاف تحقیقات گذشته، از نانوسیال موجود در شرایط آزمایشگاهی مانند آب-مس استفاده شده است. نتایج بدست آمده نشان از بیشترین تاثیر گذاری زبری مستطیلی و کمترین تاثیر گذاری زبری مثلثی بر رفتار جریان دارد و در نتیجه لغزش در نانوکانال با زبری مثلثی با شدت بیشتری رخ میدهد. وجود زبری روی سطح باعث افزایش تعداد نوسانات در لایه های سیال میشود ولی دامنه نوسان در نزدیکی دیواره صاف نسبت به زبر افزایش یافته است. حضور نانوذرات نیز باعث افزایش این اثرگذاری بر خواص جریان میشود.
Keywords [Persian]
شبیه سازی دینامیک مولکولی، نانوسیال، آب-مس، رفتار دینامیکی جریان
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