The Experts below are selected from a list of 54 Experts worldwide ranked by ideXlab platform
Mehmet Emin Canli - One of the best experts on this subject based on the ideXlab platform.
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investigation of effect of the circular ring turbulators on heat transfer augmentation and Fluid Flow Characteristic of solar air heater
Experimental Thermal and Fluid Science, 2016Co-Authors: Adem Acir, Mehmet Emin CanliAbstract:Abstract This study presented effects of the circular ring turbulators (CRTs) having different pitch ratio and hole number on heat transfer augmentation in a new type solar air heater (SAH). The experiments have been performed by varying the parameters, pitch ratio ( PR ), hole number ( N ) and Reynolds number ( Re ) in a range of between 3000 and 7500 under solar radiation heat flux ( I ). The results obtained using CRTs compared with conventional plain tube. The experimental results have shown a significant enhancement in heat transfer on SAHs with CTRs. According to the experimental results, the higher heat transfer augmentation with CRTs inserted inside the tube in SAHs have been obtained for PR = 2 and N = 2. The best experimental results were found with ∼229% heat transfer enhancement, ∼5.8 times friction factor compared to a conventional plain tube and the thermal performance factor ( η ) was computed as ∼1.83. In addition, statistical correlations for Nu , f and η were developed. These correlation results illustrated a good agreement with experimental results with ±10% deviation.
Adem Acir - One of the best experts on this subject based on the ideXlab platform.
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investigation of effect of the circular ring turbulators on heat transfer augmentation and Fluid Flow Characteristic of solar air heater
Experimental Thermal and Fluid Science, 2016Co-Authors: Adem Acir, Mehmet Emin CanliAbstract:Abstract This study presented effects of the circular ring turbulators (CRTs) having different pitch ratio and hole number on heat transfer augmentation in a new type solar air heater (SAH). The experiments have been performed by varying the parameters, pitch ratio ( PR ), hole number ( N ) and Reynolds number ( Re ) in a range of between 3000 and 7500 under solar radiation heat flux ( I ). The results obtained using CRTs compared with conventional plain tube. The experimental results have shown a significant enhancement in heat transfer on SAHs with CTRs. According to the experimental results, the higher heat transfer augmentation with CRTs inserted inside the tube in SAHs have been obtained for PR = 2 and N = 2. The best experimental results were found with ∼229% heat transfer enhancement, ∼5.8 times friction factor compared to a conventional plain tube and the thermal performance factor ( η ) was computed as ∼1.83. In addition, statistical correlations for Nu , f and η were developed. These correlation results illustrated a good agreement with experimental results with ±10% deviation.
Hamidon Salleh - One of the best experts on this subject based on the ideXlab platform.
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numerical study on heat transfer and Fluid Flow Characteristic of tube bank with integral wake splitter effect of wake splitter length
Applied Mechanics and Materials, 2013Co-Authors: Abobaker Mohammed Alakashi, Hamidon SallehAbstract:The purpose of this research is to investigate effect of wake splitter to pressure drop and heat transfer Characteristics in a tube bank with staggered arrangements. The pressure drop and averaged heat transfer coefficient of seven rows with five tubes in each row with integral wake splitter has been determined by means of 2-D simulation using commercial computational Fluid dynamics (CFD) code Fluent. Two type of integral wake splitter length have been studied, 0.5D and 1D with different location. Simulations have been carried out at Reynolds number based on tube diameter from 5000 up to 27800. The results, presented in terms of pressure drop as well as averaged heat transfer coefficient values, show the influence of wake splitter length and direction. By adding 0.5D wake splitter at downstream direction leads to higher averaged heat transfer coefficient and reduction of the pressure drop.
Abobaker Mohammed Alakashi - One of the best experts on this subject based on the ideXlab platform.
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numerical study on heat transfer and Fluid Flow Characteristic of tube bank with integral wake splitter effect of wake splitter length
Applied Mechanics and Materials, 2013Co-Authors: Abobaker Mohammed Alakashi, Hamidon SallehAbstract:The purpose of this research is to investigate effect of wake splitter to pressure drop and heat transfer Characteristics in a tube bank with staggered arrangements. The pressure drop and averaged heat transfer coefficient of seven rows with five tubes in each row with integral wake splitter has been determined by means of 2-D simulation using commercial computational Fluid dynamics (CFD) code Fluent. Two type of integral wake splitter length have been studied, 0.5D and 1D with different location. Simulations have been carried out at Reynolds number based on tube diameter from 5000 up to 27800. The results, presented in terms of pressure drop as well as averaged heat transfer coefficient values, show the influence of wake splitter length and direction. By adding 0.5D wake splitter at downstream direction leads to higher averaged heat transfer coefficient and reduction of the pressure drop.
Aritra Rakshit - One of the best experts on this subject based on the ideXlab platform.
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A Numerical Investigation Based on Heat Transfer and Fluid Flow Characteristics of Air in a Circular Tube Heat Exchanger with Inclined Ribs
Recent Advances in Chemical Engineering, 2016Co-Authors: Suvanjan Bhattacharyya, Himadri Chattopadhyay, Aritra RakshitAbstract:This paper encapsulates the results of a numerical investigation based on heat transfer and Fluid Flow Characteristic of water through a two-dimensional model of an isothermal-fluxed circular duct with alternating inclined ribs. The effects of artificial inclined rib’s roughness on heat transfer and Fluid Flow have been investigated. A 2-D numerical simulation is performed using the ANSYS FLUENT 15 code. The simulation is conducted in order to gain an understanding of physical behaviour of the thermal and Fluid Flow in the duct fitted artificial inclined ribs under constant wall temperature conditions for all three Flow regimes—Laminar, Transitional and Turbulent; that is, for the Reynolds number ranging from 200 to 20,000. The Navier–Stokes equation in common with an energy equation is solved using the SIMPLE technique with Shear Stress Transport (SST) k–ω turbulence model. The heat transfer and thermal performance of the inclined ribs at various attack angles (θ) of 15°, 30°, 45° and 60° with different Reynolds number (200–20,000) are studied and compared with those of a plain isothermal-fluxed circular duct. The Nusselt’s number increases with the increase of attack angle (θ = 15°–60°), also increase of Reynolds number. All ribs at different angle of attack (θ = 15°, 30°, 45°, 60°) have good thermal performance with greater than unity which indicates that the compound heat transfer technique of inclined ribs with different angle of attack is commendable for the maximum enhanced heat transfer rate for higher Reynolds number.