فهرست مقالات Non-Newtonian fluid

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  1 - The effects of MHD flow of third grade fluid by means of meshless local radial point interpolation (MLRPI)
  S. Abbasbandy E. Shivanain
  The meshless local radial point interpolation (MLRPI) method is applied to examine the magnetohydrodynamic (MHD) ow of third grade uid in a porous medium. The uid saturates the porous space between the two boundaries. Several limiting cases of fundamental ows can be obt چکیده کامل

  The meshless local radial point interpolation (MLRPI) method is applied to examine the magnetohydrodynamic (MHD) ow of third grade uid in a porous medium. The uid saturates the porous space between the two boundaries. Several limiting cases of fundamental ows can be obtained as the special cases of present analysis. The variations of pertinent parameters are addressed. پرونده مقاله
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  2 - Numerical Study of the Flow Field and Heat Transfer of a Non-Newtonian Magnetic Nanofluid in A Vertical Channel Affected by A Magnetic Field
  amireh nourbakhsh amirreza sadeghi
  10.30486/admt.2022.1939334.1312
  The present paper examines thermal and hydrodynamic behavior of the incompressible laminar flow of a non-Newtonian magnetic nanofluid in a vertical rectangular channel numerically using two-phase mixture model, Carreau model, and finite volume method. The non-uniform tr چکیده کامل

  The present paper examines thermal and hydrodynamic behavior of the incompressible laminar flow of a non-Newtonian magnetic nanofluid in a vertical rectangular channel numerically using two-phase mixture model, Carreau model, and finite volume method. The non-uniform transverse magnetic field is created by an electric current-carrying wire located along the channel. The Schiller-Naumann model is employed to calculate the slip velocity between the solid and liquid phases. The flow pattern and nanofluid temperature is assessed by changing effective parameters such as Reynolds number, the magnetic field strength, flow rate, mean axial temperature, and channel heat transfer. It is observed that the transverse secondary flow increases by increasing the magnetic strength due to Kelvin force. The hot fluid is transferred more from the sidewall to the center of the channel and the cold fluid moves from the center of the channel towards the wall, leading to an increase in heat transfer. Also, at low Reynolds numbers, more fluctuations occur in the velocity profile due to the dominance of Kelvin force over inertial force. پرونده مقاله
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  3 - Vibration Analysis of Carotid Arteries Conveying Non-Newtonian Blood Flow Surrounding by Tissues
  A.H Ghorbanpour Arani A Rastgoo A. Ghorbanpour Arani R Kolahchi
  The high blood rate that often occurs in arteries may play a role in artery failure and tortuosity which leads to blackouts, transitory ischemic attacks and other diseases. However, vibration and instability analysis of carotid arteries are lacking. The objective of thi چکیده کامل

  The high blood rate that often occurs in arteries may play a role in artery failure and tortuosity which leads to blackouts, transitory ischemic attacks and other diseases. However, vibration and instability analysis of carotid arteries are lacking. The objective of this study is to investigate the vibration and instability of the carotid arteries conveying blood under axial tension with surrounding tissue support. Arteries are modeled as elastic cylindrical vessels based on first order shear deformation theory (FSDT) within an elastic substrate. The elastic medium is simulated with visco-Pasternak foundation. The blood flow in carotid artery is modeled with non-Newtonian fluid based on Carreau, power law and Casson models. Applying energy method, Hamilton principle and differential quadrature method (DQM), the frequency, critical blood velocity and transverse displacement of the carotid arteries are obtained. It can be seen that increasing the tissue stiffness would delay critical blood velocity. The current model provides a powerful tool for further experimental investigation arteries tortuosity. In addition, the dimensionless transverse displacement predicted by Newtonian model is lower than that of non-Newtonian models. پرونده مقاله
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  4 - مدل سازی عددی اثر اتصالات لوله حفاری برروی افت فشار اصطکاکی گل حفاری هرشل-بالکی در حفاری چاه‌های نفتی
  محمد مرادمند ضیاءبری
  در این مقاله، بررسی رفتار جریان سیال غیرنیوتنی و به‌طور ویژه افت فشار اصطکاکی در اتصالات جوشکاری شده در هندسه‌های متفاوت با توجه به استاندارد IADC ]1[ از طریق شبیه سازی عددی انجام پذیرفته‌است. فرآیند شبیه‌سازی با استفاده از 6 سیال حفاری دارای خواص ویسکوپلاستیک متفاوت، پ چکیده کامل

  در این مقاله، بررسی رفتار جریان سیال غیرنیوتنی و به‌طور ویژه افت فشار اصطکاکی در اتصالات جوشکاری شده در هندسه‌های متفاوت با توجه به استاندارد IADC ]1[ از طریق شبیه سازی عددی انجام پذیرفته‌است. فرآیند شبیه‌سازی با استفاده از 6 سیال حفاری دارای خواص ویسکوپلاستیک متفاوت، پیرو مدل غیرنیوتنی هرشل-بالکلی (6 سیالی که در میادین نفتی جنوب کشور استفاده می‌شوند) انجام شده‌است و جهت مقایسه و اعتبارسنجی از دو مدل توانی و نیوتنی کمک گرفته شده‌است. پس از آن اثر متغیرهای هندسی مانند نسبت قطر و خروج از مرکز فضای حلقوی در این هندسه خاص مورد بررسی قرار گرفته‌است. نتایج بدست آمده نشان می‌دهد که وجود اتصالات تأثیر بسزایی در افزایش افت فشار در چاه دارد. برای مدل نیوتنی حداکثر تا 18 درصد، و برای مدل‌های توانی و هرشل- بالکلی به ترتیب حداکثر تا 7 و 3 درصد افزایش در افت فشار فضای حلقوی مشاهده شد. پرونده مقاله
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  5 - Investigation of blood flow as third order non-Newtonian fluid inside a porous artery in the presence of a magnetic field by an analytical method
  مهران خاکی جامعی محمدرضا سیجانی
  In this research various nonlinear fluid models have been introduced and the balloon movement in the porous arteries, including third-order non-Newtonian fluid, is described under the influence of the magnetic field. In order to solve the nonlinear equations governing t چکیده کامل

  In this research various nonlinear fluid models have been introduced and the balloon movement in the porous arteries, including third-order non-Newtonian fluid, is described under the influence of the magnetic field. In order to solve the nonlinear equations governing the desired artery, an analytical method of approximation collocation and least squares are proposed. The effect of various parameters such as Brownian motion, thermophoresis and pressure gradient are shown on the distribution of velocity and fluid temperature. According to the studies, Increase the thermophoresis parameter and Brownian motion are increases the temperature. Also, by increasing the values of the electromagnetic parameter, fluid velocity decreases. Although many papers have investigated the flow of intra-arterial blood in the presence of MHD, it is clear that the governing equations of these articles unfortunately reveal obvious errors by extracting the governing equations. In this paper, the equations have been revised and corrected. It can also be seen by increasing the thermophoresis and Brownian parameters, increases the temperature of the nanofluid, but reduces velocity of the nanofluid and also increase the porosity parameter, the velocity of fluid flow between the balloon and the vessel wall decreases. پرونده مقاله