ملف المستخدم
صورة الملف الشخصي

Assist. Lect. Sarmad A. Ali

إرسال رسالة

التخصص: MSc of Mechanical Engineering - Thermal Power

الجامعة: University of Babylon - Faculty of Engineering Al Musayab - Automobile Engineering Department

النقاط:

17.5
معامل الإنتاج البحثي

الخبرات العلمية

  • Commercial CFD Code Like Ansys Fluent and COMSOL Multiphysics
  • Reviewer for: the 6th international conference of modern technologies in agricultural sciences (6th-icmtas)
  • Reviewer for: 2nd International Conference on Emerging Trends and Applications in Artificial Intelligence
  • Reviewer for: 4th International Conference of Engineering Science
  • Area of Interest: Heat Transfer Enhancement, Computational Fluid Dynamics (CFD), Thermal Power, Numerical Simulation

الأبحاث المنشورة

Experimental Investigation of Forced Convection in Plain or Partly Inserted Square Channel with Porous Media

المجلة: Journal of Engineering

سنة النشر: 2024

تاريخ النشر: 2024-04-01

0

CFD-FSI analysis of textured journal bearing working with nano lubricant

المجلة: DIAGNOSTYKA

سنة النشر: 2024

تاريخ النشر: 2024-05-23

This research aims to examine the compound impact of adding rectangular textures to various zones on the surface of the bearing and nanoparticles in the lubricant on the properties of journal bearing. A lubrication models with various texture depths and eccentricity ratios of journal bearing are created and simulated using CFD-FSI method to get static properties like load capacity and frictional force. Aluminum oxide nanoparticles were added in weight ratios ranging from 0.1 to 0.5 %, and the change in viscosity due to these additives in the lubricant was considered. Cavitation and the dependence of viscosity on temperature effects are also considered. The validation results show that the acquired results from the current simulation method agree well with the experimental results in the reference. The outcomes indicated that the highest load capacity and the lowest frictional force are found in the high-pressure region. It was noted that the maximum rise in load capacity was 16.51% without nanoparticles at a texture depth of 0.5 mm and eccentricity ratio of 0.1, and with the adding of 0.5 wt. % of nanoparticles to the lubricant in the same region, the load carrying capacity increased to 40.87 % compared to a bearing without textures.

Numerical Analysis of Heat Transfer Enhancement Using Water / FMWCNT Nanofluid Passed in a 2D Backward Facing Step Channel

المجلة: Al-Rafidain Journal of Engineering Sciences

سنة النشر: 2024

تاريخ النشر: 2024-08-16

In recent years, the study of heat transfer of Nano fluids, rheological behavior, and significant developments in this field have led to the widespread use of industrial equipment among researchers. Current numerical analysis of three different ratios (0.0, 0.12, and 0.25 %) of a nanomaterial functional multi-walled carbon nanotube (FMWCNT) is used by mixing it with pure water to improve the thermophysical properties of water. The finite volume method (Ansys Fluent R23) was used for the Reynolds number range of (10000 -18000) with turbulent flow. The results of the numerical simulation were interpreted as the Nusselt number, the features of the distribution of fluid velocity, temperature, and pressure. The results of the current study indicate a decrease in surface temperature and an increase in the coefficient of heat transfer by forced convection as a result of enhancing the weight ratio of nanomaterial and the Reynolds number. The axial velocity of the flow increased by increasing the Reynolds number, resulting in enhanced momentum. The decrease in axial velocity and the increase in the probability of vortex generation at the beginning of the channel when the fluid momentum increases, especially near the lower wall.

Numerical analysis to investigate the effect partially filled of porous media inserted in a square channel for different locations

المجلة: Int. J. Nonlinear Anal. Appl.

سنة النشر: 2023

تاريخ النشر: 2023-02-15

Various methods are used to improve the heat transfer coefficient of fluids flow inside the various cross-sections of channels, and one of these methods is the use of porous media (PM) in various engineering and industrial applications such as heat exchangers and storage tanks for solar energy. This research paper shows a numerical study using the COMSOL Multiphysics 6.0 program, the effect of the PM (Glass Spheres) inside a square-shaped channel (12 * 12 cm2) by taking three different locations of the PM for two cases (constant heat flux, and constant wall temperature) at the lower surface of a test section and knowing their effect on the distribution of temperature, and velocity to compare them with the absence of the PM for the same channel. The results showed the best temperature distribution to get the best heat transfer coefficient and thus increase the Nusselt number in position (1) of the PM for the test section.

Investigating Heating Transfer and Turbulent Flow in a Channel for Different Cross Sections Full-Filled of Glass Spheres as a Porous Media

المجلة: Al-Iraqia Journal for Scientific Engineering Research

سنة النشر: 2023

تاريخ النشر: 2023-03-15

In recent years various modern improvements have been used to raise the performance of heat systems in various engineering and industrial applications. One of these improvements is the use of porous material. This research focuses on conducting a theoretical study (numerical simulation) via forced convection heat transfer of three channels of various cross-sections (square, rectangular, and triangular) with an equal hydraulic diameter of (0.15 m) with glass spheres filled of a diameter (0.012 m) as a porous martial. The lower surface of the test section is subjected to a uniform heat flux along the fluid flow of (5000 W/m2), while the upper surface is thermally insulated. The type of model used in this study (k- epsilon turbulent model) to simulate and analyze fluid flow inside three channels. This study aims to enhance the thermal properties of the fluid (water) and study its effect on the distribution of temperature, velocity, and pressure, respectively. The results showed that the channel with a triangular cross-section gives the highest distribution of temperature and pressure compared to the rest, and therefore it is considered the optimal design for the channels.

Study the Forced Convection of a Hybrid Nanofluid in a Square Channel Partially Filled with a Porous Media Using the K-epsilon Turbulence Model

المجلة: Kerbala journal for engineering sciences

سنة النشر: 2023

تاريخ النشر: 2023-03-31

The use of joint technologies to improve the heat transfer process in engineering and industrial applications enhances the heat transfer coefficient and Nusselt number, thus increasing its thermal efficiency and performance for these applications for example (air conditioning systems, solar energy systems, storage tanks, and heat exchangers). This paper presents a numerical simulation using (the k-epsilon turbulence) model to investigate the influence of forced convection heat transfer and fluid flow for a channel (square cross-section) of a length (50 cm), width of (12 cm), and height (12 cm) partially filled with height layer (8 cm) of the porous medium (Glass Spheres of diameter 5mm) with the addition of hybrid nanofluids (HNF) to the base fluid (Engine Oil) as a combined technique to obtain the best improvement, where the three- dimensional (3D) test model was designed using the commercial code COMSOL Multiphysics 6.0 program in two cases, the first does not contain any addition to the improvement, and the second contains the joint techniques (porous media and HNF), the governing equations for the turbulent flow of the fluid (mass conservation equation, momentum conservation equation, energy conservation equation) were solved. The results showed that the temperature, velocity, and pressure distribution of the base fluid in a test section increases significantly using these techniques and enhances the heat transfer coefficient compared to the results for the test section without these additions. In addition, the temperature distribution increases with the increase in the axial length of the fluid flow in the test section of the channel

Experimental Investigation of Forced Convection in Plain or Partly Inserted Square Channel with Porous Media

المجلة: Journal of Engineering

سنة النشر: 2024

تاريخ النشر: 2024-04-01

Several techniques are used to improve the channels' heat transfer coefficient and Nusselt number. One of the methods used for these improvements is porous media (PM). This research deals with an experimental study of heat transfer by forced convection inside a square-shaped channel (0.12 x 0.12 m2) with a length of (0.5 m) and a hydraulic diameter of (0.12 m). The heat flux (4791.7 W/m2) is exposed below the test section, and other walls are thermally insulated. The air was used as the working fluid for the Reynolds number range (2689.6 to 5806.3). The channel was partially filled with the PM (glass spheres with 5mm diameter) by taking three different heights layers (20, 40, and 60 mm) and knowing its effect on the temperature distribution, the local heat transfer coefficient, locally Nusselt number, and the average heat transfer coefficient and Nusselt number. Also, the same parameters were studied without PM inside the channel (plain). The results showed that the PM improved the heat transfer coefficient and the Nusselt number. Also, the temperature distribution decreased gradually with the Reynolds number increase for each height layer, the local heat transfer coefficient and local Nusselt number gradually reduced with the length of the test section increase for each Reynolds number, average Nusselt number increased gradually with the growth of the Reynolds number for each height layer. The PM layer at a height of (60 mm) gave the best improvement in the heat transfer coefficient and Nusselt number compared to the other layers. In addition, the friction factor across the test section at this layer decreases gradually with increasing fluid velocity.