Thermal and Flow Fields In Single Board Computer Cabin Systems Using CFD Analysis

Xu, Shaowen; Guo, Zongkun; Hu, Guangxin; Chen, Wusi; Lewis, Raynold; Wong, Chun-Nam

doi:10.1080/19942060.2014.11083308

Cited by 7 publications

(8 citation statements)

References 13 publications

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“…The rst application of the combined CFD-DEM model was reported to be the solid particle plug ow in a horizontal tube [16], and then many others have been devoted to the analysis and simulation of various aspects of uidized beds using coupled CFD-DEM calculations [17]. In the coupled solution process, the ow eld is treated as a continuous phase and the solid phase is treated as a discrete phase, and the corresponding solutions for the ow eld and the particle phase are obtained by the coupled calculation of the two software [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Analysis of gas-solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

Zhang

Men

Pan

et al. 2022

Preprint

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Purpose: To address the problem of low efficiency of recycling process waste by gas-solid two-phase flow of the shot blasting machine recycling device, a method and structure by increasing the negative pressure value and optimizing the outlet pipe position are proposed. Methods: Computational fluid dynamics (CFD), discrete element method (DEM) and discrete phase model (DPM) were used to study the waste recovery efficiency at different pressure outlet conditions and outlet pipe locations. The validity of the model was verified by velocity tests at the outlet and inlet compared with simulations. The effect of particle size and particle generation rate on solid particle recovery efficiency was further investigated by analyzing the flow field distribution of the recovery unit. The results show that: the maximum velocity of the gas phase in the recovery device increases with the increase of the absolute value of the outlet pressure, when the outlet pressure is -6500 Pa, the maximum velocity is 67.59 m/s. When the absolute value of the outlet pressure is greater than 6000 Pa, a small amount of steel shot particles is discharged from the recovery bin under the action of the outlet pressure, resulting in the loss of steel shot particles. After the outlet pipe position optimization, the steel shot particle recovery efficiency increased by 10% and the waste particle recovery efficiency increased by 18.9%.

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Section: Introductionmentioning

confidence: 99%

Analysis of gas-solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

Zhang

Men

Pan

et al. 2022

Preprint

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“…The insertion of turbulators and vortex generators (Ts-VGs) inside channel heat exchangers (CHEs) is well-known for its efficiency to enhance the convective heat transfer [1][2][3][4][5][6][7]. Several studies have been reported on CHEs equipped with various types of obstacles.…”

Section: Introductionmentioning

confidence: 99%

Simulating the Turbulent Hydrothermal Behavior of Oil/MWCNT Nanofluid in a Solar Channel Heat Exchanger Equipped with Vortex Generators

Maouedj¹,

Menni²,

Chu³

et al. 2021

Computer Modeling in Engineering &Amp; Sciences

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Re-engineering the channel heat exchangers (CHEs) is the goal of many recent studies, due to their great importance in the scope of energy transport in various industrial and environmental fields. Changing the internal geometry of the CHEs by using extended surfaces, i.e., VGs (vortex generators), is the most common technique to enhance the efficiency of heat exchangers. This work aims to develop a new design of solar collectors to improve the overall energy efficiency. The study presents a new channel design by introducing VGs. The FVM (finite volume method) was adopted as a numerical technique to solve the problem, with the use of Oil/MWCNT (oil/multi-walled carbon nano-tubes) nanofluid to raise the thermal conductivity of the flow field. The study is achieved for a Re number ranging from 12 × 10 3 to 27 × 10 3 , while the concentration (φ) of solid particles in the fluid (Oil) is set to 4%. The computational results showed that the hydrothermal characteristics depend strongly on the flow patterns with the presence of VGs within the CHE. Increasing the Oil/MWCNT rates with the presence of VGs generates negative turbulent velocities with high amounts, which promotes the good agitation of nanofluid particles, resulting in enhanced great transfer rates.

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“…The comparative results showed that the trapezoidal-shape porous-type inserts increase the heat transfer by about 13.8% in the case of 1.7 kPa of pressure penalty and 6.4 kg/s of fluid mass. Using the FLO EFD 9.0 type CFD software, Xu et al (2014) conducted a detailed numerical analysis of the flow fields as well as the isotherms in a computer board. The whole system adopted the combination of liquidtype cooling and air-type cooling to increase heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Numerical calculations of the thermal-aerodynamic characteristics in a solar duct with multiple V-baffles

Menni

Ghazvini

Ameur

et al. 2020

Engineering Applications of Computational Fluid Mechanics

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The study aimed to enhance the heat transport by improving the hydrodynamic structure of the system by changing and restructuring the duct's internal geometry. Modern fins, of the shape 'V', have been proposed with different dimensions, and they are periodically arranged over the duct surfaces. The most important steps of this research are the change in the V-fin attack-angle (40°-80°), length (H b /2, 3H b /4, H b , 5H b /4 and 3H b /2), and separation length (D s /2, 3D s /4, D s and 5D s /4), as well as the flow rate (6 × 10 3-3 × 10 4). The study yielded an optimum case for a 40-degree attack-angle, with a factor of thermal enhancement of 2.163 for the highest value of Reynolds number. On the other hand, improving the length of the V-fins or decreasing in the space between them, increases the flow strength by enlarging the recycling cells, which reflects on the hydrodynamic behavior, and changes the heat transfer. The presence of this new model of fins also highlights a hydrothermal improvement ranging between 1.196 and 23.779 percent compared to the previously indicated models, reflecting the effectiveness of the new system of solar heat exchangers with air V-finned ducts.

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Thermal and Flow Fields In Single Board Computer Cabin Systems Using CFD Analysis

Cited by 7 publications

References 13 publications

Analysis of gas-solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

Analysis of gas-solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

Simulating the Turbulent Hydrothermal Behavior of Oil/MWCNT Nanofluid in a Solar Channel Heat Exchanger Equipped with Vortex Generators

Numerical calculations of the thermal-aerodynamic characteristics in a solar duct with multiple V-baffles

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