Browsing by Author "Mahariq, Ibrahim"

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Citation Count: Ghalandari, Mohammad...et al. (2022). "Aeroelastic Optimization of the High Aspect Ratio Wing with Aileron", CMC-Computers Materials & Continua, Vol. 70, No. 3, pp. 5569-5581.
Aeroelastic Optimization of the High Aspect Ratio Wing with Aileron
(2022) Ghalandari, Mohammad; Mahariq, Ibrahim; Ghadak, Farhad; Accouche, Oussama; Jarad, Fahd; 234808
In aircraft wings, aileron mass parameter presents a tremendous effect on the velocity and frequency of the flutter problem. For that purpose, we present the optimization of a composite design wing with an aileron, using machine-learning approach. Mass properties and its distribution have a great influence on the multi-variate optimization procedure, based on speed and frequency of flutter. First, flutter speed was obtained to estimate aileron impact. Additionally mass-equilibrated and other features were investigated. It can deduced that changing the position and mass properties of the aileron are tangible following the speed and frequency of the wing flutter. Based on the proposed optimization method, the best position of the aileron is determined for the composite wing to postpone flutter instability and decrease the existed stress. The represented coupled aero-structural model is emerged from subsonic aerodynamics model, which has been developed using the panel method in multidimensional space. The structural modeling has been conducted by finite element method, using the p-k method. The fluid -structure equations are solved and the results are extracted.
Citation Count: Chen, Yuning...et al. (2021). "Compound usage of L shaped fin and Nano-particles for the acceleration of the solidification process inside a vertical enclosure (A comparison with ordinary double rectangular fin)", Case Studies in Thermal Engineering, Vol. 28.
Compound usage of L shaped fin and Nano-particles for the acceleration of the solidification process inside a vertical enclosure (A comparison with ordinary double rectangular fin)
(2021) Chen, Yuning; Feng, Li; Jamal, Sajjad Shaukat; Sharma, Kamal; Mahariq, Ibrahim; Jarad, Fahd; Arsalanloo, Akbar; 234808
Performance enhancement of energy storing unite is a very important issue in renewable energy systems. In the present investigation, L shaped fins with two different orientations and various geometrical properties were considered to enhance the solidification performance inside a vertical enclosure. Furthermore, effect of two types of Nano-particles with different concentrations were evaluated. It was found that the application of downward L shaped fin is better than upward form in solidification process. Also, results revealed that case with same length in vertical and horizontal part of L shaped fin has best performance. Furthermore, results presented that there is no need to use high cost Nano-particles of Cu because low cost Nano-particles of Al2O3 have better performance in considered issue. Best performance was related to case 3 which had 12.3% enhancement in the solidification time. Also, between the downward fins, the best case was related to case 8 which provided about 21.5% reduction in the solidification time. Furthermore, it was found that the application of AL(2)O(3) with concertation of 2% and case 8, provided about 27% improvement in the total melting time when compared to the Base case.
Citation Count: Ayed, Hamdi;...et.al. (2022). "Experimental investigation on the thermo-hydraulic performance of air–water two-phase flow inside a horizontal circumferentially corrugated tube", Alexandria Engineering Journal, Vol.61, No.9, pp.6769-6783.
Experimental investigation on the thermo-hydraulic performance of air–water two-phase flow inside a horizontal circumferentially corrugated tube
(2022) Ayed, Hamdi; Arsalanloo, Akbar; Khorasani, Saleh; Youshanlouei, Mohammad Mehdizadeh; Jafarmadar, Samad; Abbasalizadeh, Majid; Jarad, Fahd; Mahariq, Ibrahim; 234808
In this study, flow visualization, pressure drop and thermal characteristics of the corrugated tube with non-boiling air–water two-phase flow were experimentally studied. Glass tubes were used to visualize the flow patterns of two-phase flow. Furthermore, the thermal behavior of two phase flow was studied in the copper made tubes which was under constant heat flux. The total of 740 W thermal energy was applied on tubes. Superficial velocity of liquid was within the range of 0.42 m/s to 1.69 m/s. Also, the superficial velocity of air was within the range of 0.21 m/s to 1.06 m/s. The results revealed that the corrugations significantly affect the flow patterns which results in earlier transition. The flow patterns of bubbly, churn, wavy slug, wavy plug, wavy stratified and mist flow were observed inside corrugated tube. Also, it was found that the maximum Nusselt number increment in corrugated tube was 3%. Besides, formation of the mist flow in corrugated tube reduced the Nusselt number. Also, the pressure drop was significantly affected by the air–water two-phase flow presenting around 165 % in the pressure drop compared to the single phase flow.
Citation Count: Ghalandari, Mohammad...et al. (2022). "Identification of composite-metal bolted structures with nonlinear contact effect", Computers, Materials and Continua, Vol. 70, No. 2, pp. 3383-3397.
Identification of composite-metal bolted structures with nonlinear contact effect
(2022) Ghalandari, Mohammad; Mahariq, Ibrahim; Pourghasem, Majid; Mulki, Hasan; Jarad, Fahd; 234808
The middle layer model has been used in recent years to better describe the connection behavior in composite structures. The influencing parameters including low pre-screw and high preload have the main effects on nonlinear behavior of the connection as well as the amplitude of the excitation force applied to the structure. Therefore, in this study, the effects of connection behavior on the general structure in two sections of increasing damping and reducing the stiffness of the structures that lead to non-linear phenomena have been investigated. Due to the fact that in composite structure we are faced to the limitation of increasing screw preload which tend to structural damage, so the investigation on the hybrid connection (metal-composite) behavior is conducted. In this research, using the two-dimensional middle layer theory, the stiffness properties of the connection are modeled by normal stiffness and the connection damping is modeled using the structural damping in the shear direction. Nonlinear frequency response diagrams have been extracted twice for two different excitation forces and then proposed by a high-order multitasking approximation according to the response range of the nonlinear finite element model for stiffness and damping of the connection. The effect of increasing the amplitude of the excitation force and decreasing the preload of the screw on the nonlinear behavior of the component has been extracted. The results show that the limited presented novel component model has been accurately verified on the model obtained from the vibration experimental test and the reduction of nonlinear model updating based on that is represented. The comparison results show good agreement with a maximum of 1.33% error. © 2022 Tech Science Press. All rights reserved.
Citation Count: Sunthrayuth, Pongsakorn;...et.al. (2021). "Numerical Analysis of the Fractional-Order Nonlinear System of Volterra Integro-Differential Equations", Journal of Function Spaces, Vol.2021.
Numerical Analysis of the Fractional-Order Nonlinear System of Volterra Integro-Differential Equations
(2021) Sunthrayuth, Pongsakorn; Ullah, Roman; Khan, Adnan; Shah, Rasool; Kafle, Jeevan; Mahariq, Ibrahim; Jarad, Fahd; 234808
This paper presents the nonlinear systems of Volterra-type fractional integro-differential equation solutions through a Chebyshev pseudospectral method. The proposed method is based on the Caputo fractional derivative. The results that we get show the accuracy and reliability of the present method. Different nonlinear systems have been solved; the solutions that we get are compared with other methods and the exact solution. Also, from the presented figures, it is easy to conclude that the CPM error converges quickly as compared to other methods. Comparing the exact solution and other techniques reveals that the Chebyshev pseudospectral method has a higher degree of accuracy and converges quickly towards the exact solution. Moreover, it is easy to implement the suggested method for solving fractional-order linear and nonlinear physical problems related to science and engineering.
Citation Count: Izadi, Mohsen;...et.al. 82023). "Numerical investigation of magneto-thermal-convection impact on phase change phenomenon of Nano-PCM within a hexagonal shaped thermal energy storage", Applied Thermal Engineering, Vol.223.
Numerical investigation of magneto-thermal-convection impact on phase change phenomenon of Nano-PCM within a hexagonal shaped thermal energy storage
(2023) Izadi, Mohsen; Sheremet, Mikhail; Hajjar, Ahmad; Galal, Ahmed M.; Mahariq, Ibrahim; Jarad, Fahd; Ben Hamida, Mohamed Bechir; 234808
Latent heat storage is among the most effective thermal energy storage techniques. The heat can be stored or released in a phase change substance undergoing melting or solidification. The present research addresses the melting process of paraffin, a phase change material, enhanced with metallic alumina nanoparticles, inside a hexagonal heat storage unit in the presence of a uniform magnetic field is investigated. The melting process occurs during the thermal charge of the latent heat storage unit. The enthalpy-porosity method was employed to model the melting process. The influence of the Lorentz force strength and magnetic field inclination angle as well as the nanoparticle concentration on charging level was scrutinized. It was found that the Lorentz force can suppress the charging level of the thermal energy storage system, while the magnetic field inclination angle can be suitable to control the energy transport performance and melting motion within the thermal energy storage unit. Moreover, raising the nanoadditives concentration diminishes the melting process. Overall, the obtained results confirmed that altering the intensity or direction of the external magnetic field presents indeed a mean for controlling the flow and thermal behavior of nano-enhanced phase change materials. Imposing the Ha up to 500 increases 266% the dimensionless melting time compared to ignoring magnetic field (Ha = 0).
Citation Count: Bourchi, Soumia;...et.al. (2023). "On abstract Cauchy problems in the frame of a generalized Caputo type derivative", Advances in the Theory of Nonlinear Analysis and its Applications, Vol.7, No.1, pp.1-28.
On abstract Cauchy problems in the frame of a generalized Caputo type derivative
(2023) Bourchi, Soumia; Jarad, Fahd; Adjabi, Yassine; Abdeljawad, Thabet; Mahariq, Ibrahim; 234808
In this paper, we consider a class of abstract Cauchy problems in the framework of a generalized Caputo type fractional. We discuss the existence and uniqueness of mild solutions to such a class of fractional differential equations by using properties found in the related fractional calculus, the theory of uniformly continuous semigroups of operators and the fixed point theorem. Moreover, we discuss the continuous dependence on parameters and Ulam stability of the mild solutions. At the end of this paper, we bring forth some examples to endorse the obtained results.
Citation Count: Xie, Changgui;...et.al. (2022). "Performance boost of a helical heat absorber by utilization of twisted tape turbulator, an experimental investigation", Case Studies in Thermal Engineering, Vol.36.
Performance boost of a helical heat absorber by utilization of twisted tape turbulator, an experimental investigation
(2022) Xie, Changgui; Mansir, Ibrahim B.; Mahariq, Ibrahim; Singh, Pradeep Kumar; Arsalanloo, Akbar; Shahzad, Rehman Muhammad; Jarad, Fahd; 234808
Present investigation, experimentally probes the influence of utilization of twisted tape turbulator inside a helical tube. Twisted tapes mix the flow and enhance the heat transfer rate. The pitch of twisted tape was considered as variant parameter. Tube was considered to be under constant heat flux. Also, Re number was within the range of 6000-32000 which denotes that flow was the turbulent flow regime. Various parameters including Nu number, friction factor and entropy generation were evaluated. Furthermore, performance evaluation criteria based on first law and second law of thermodynamics together with economic performance parameters were evaluated. The results revealed that by the increment of water flow rate and the decrement of twist pitch the Nu number would face a rise of 66% in comparison with the smooth helical tube. Also, it was found that the application of twisted tape has more effect on frictional entropy generation rather than thermal entropy generation. Finally, the results indicated that the maximum value of ηc was about 1.59 ×10-7 ($/J) which presented up to 2.7 times enhancing in the financial beneficial of the helical tube.
Citation Count: Luo, Jie;...et.al. (2022). "Profit and efficiency enhancement of a cylindrical solar collector by structural modification of helical tube", Case Studies in Thermal Engineering, Vol.34.
Profit and efficiency enhancement of a cylindrical solar collector by structural modification of helical tube
(2022) Luo, Jie; Mansir, Ibrahim B.; Sharma, Kamal; Mahariq, Ibrahim; Jarad, Fahd; Youshanlouei, Mohammad Mehdizadeh; Moria, Hazim; Aldawi, Fayez; Reda, Shaker A.; 234808
Cylindrical solar collectors (CSCs) are getting attraction. Heat extraction part of these instruments consists of a helical tube which transfers thermal energy to working fluid. Enhancement of the heat transfer process within this part leads to enhancement of energy achievement. In this paper, influence of applying helical corrugation on helical absorber was evaluated. The number of corrugations and pitch and height of corrugations were considered as variant parameters. The system was evaluated from different viewpoints and performance of system was analyzed based on performance factor and economic viewpoints. The results revealed that the presence of helical Corrugation could increase heat transfer up to 19%. It was found that Dean number of 3000 could be considered as a critical Dean number from view point of performance factor. The application of the proposed system was more beneficial at Dean numbers below 3000. It was revealed that the application of helical corrugation could provide up to 24% enhancement in economic advantage of the system. Best economic performance was related to case with four starts which had corrugation height and corrugation pitch of 0.002 m and 0.103 m and occurred at Dean number of 2000.
Citation Count: Shah, Kamal...et al. (2020). "Qualitative Analysis of a Mathematical Model in the Time of COVID-19", BioMed Research International, Vol. 2020.
Qualitative Analysis of a Mathematical Model in the Time of COVID-19
(2020) Shah, Kamal; Abdeljawad, Thabet; Mahariq, Ibrahim; Jarad, Fahd; Deniz, Sinan; 234808
In this article, a qualitative analysis of the mathematical model of novel corona virus named COVID-19 under nonsingular derivative of fractional order is considered. The concerned model is composed of two compartments, namely, healthy and infected. Under the new nonsingular derivative, we, first of all, establish some sufficient conditions for existence and uniqueness of solution to the model under consideration. Because of the dynamics of the phenomenon when described by a mathematical model, its existence must be guaranteed. Therefore, via using the classical fixed point theory, we establish the required results. Also, we present the results of stability of Ulam's type by using the tools of nonlinear analysis. For the semianalytical results, we extend the usual Laplace transform coupled with Adomian decomposition method to obtain the approximate solutions for the corresponding compartments of the considered model. Finally, in order to support our study, graphical interpretations are provided to illustrate the results by using some numerical values for the corresponding parameters of the model.
Citation Count: Ayed, Hamdi...et all. (2021). "Thermal, efficiency and power output evaluation of pyramid, hexagonal and conical forms as solar panel", Case Studies in Thermal Engineering, Vol. 27.
Thermal, efficiency and power output evaluation of pyramid, hexagonal and conical forms as solar panel
(2021) Ayed, Hamdi; Moria, Hazim; Aldawi, Fayez; Farouk, Naeim; Sharma, Kamal; Youshanlouei, Mohammad Mehdizadeh; Mahariq, Ibrahim; Jarad, Fahd; 234808
Through the present investigation, the thermal and power output of novel-shaped solar panels are evaluated. For the cooling of the mentioned forms, forced air flow was utilized. Three novel shapes, of Pyramid, Hexagonal, and Conical which had the equal lateral surface were considered. For the simulation, an open source CFD software was utilized. The lateral surfaces were put under identical amount of heat flux. Air as the coolant fluid was injected with constant inlet temperature from the trapdoors at the bottom of different shaped structures. Three different values of heat flux and air injection rate were evaluated for each shape. The outcomes presented that the conical shaped solar panel exhibits better thermal performance than other geometries. Furthermore, conical form finds the least temperature that was about 10.5 °C less than that of the pyramid-shaped panel. Furthermore, it was revealed that the corners of pyramid and hexagonal-shaped solar panels have higher temperature. Also, it was found that the efficiency of conical shaped panel was up to 8.4% more than that of pyramid-shaped panel.
Citation Count: Chen, Heng...et al. (2021). "Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator", Case Studies in Thermal Engineering, Vol. 28.
Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator
(2021) Chen, Heng; Ayed, Hamdi; Marzouki, Riadh; Emami, Faezeh; Mahariq, Ibrahim; Jarad, Fahd; 234808
Increasing use of fossil fuels has led to serious consequences on the environment including global warming, pollution, and increased costs of heating systems. This indicates the importance of improving the efficiency of devices used in heating and air conditioning systems such as heat exchangers. In this study, it was tried to enhance the performance of the heat exchanger by simultaneous use of a flat tube as a central tube of the heat exchanger and dual conic turbulator. In addition to plain conical turbulator, the influence of the conical turbulator with aerodynamic geometry was investigated on the heat transfer and pressure drop. Finally, economic evaluation of the studied cases was done based on the thermal performance enhancement factor (TEF) and the net profit of unit transferred heat load (ηp). Tests were conducted in the hot water flow rate ranging 0.033–0.0678 L/s while cold water flow rate was kept constant at 0.166 L/s. The results indicated that the heat transfers and exergy loss of the flat tube heat exchanger with a dual modified conical turbulator was up to 33% and 30% higher than the plain tube heat exchanger, respectively. Also, a heat exchanger with a modified dual turbulator with convergent embellishment (case B) selected as the economic case and has the highest TEF and ηp. It was revealed that the application of enhanced conical turbulator would lead in the increment of ηp up to 1.26 times.