A modified lumped capacitance method for transient heat transfer in a stirred tank with non-Newtonian fluid

Tian, Fengguo; Zhan, Xiaoqiang; He, Hao; Liu, Shulei; Yang, Tao; Xiao, Honghai

doi:10.1016/j.apenergy.2024.123483

Cited by 2 publications

References 42 publications

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Numerical investigation of hydrodynamic performance and power consumption in stirred reactors with perforated Scaba 6SRGT impellers for non‐Newtonian fluid

Bin,

Li,

Wan

et al. 2024

Can J Chem Eng

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The present study aims to further understand the effect of perforated Scaba 6SRGT impellers on stirring performance and impeller power consumption by numerically investigating the hydrodynamic properties of non‐Newtonian fluids in a three‐dimensional stirred reactor. After model validation, the fluid velocity, stagnant region dimensionless volume, and impeller power consumption are quantitatively analyzed under the conditions of influencing parameters, including blade perforation pitch, ratio of distance between adjacent perforations, and perforation arrangement. The results reveal that the range of distribution of acceleration and peak velocity of the fluid along the radial appear in regions lower and larger than the dimensionless radius of the impeller (|r/R| = 0.45), respectively. Increasing the perforation pitch from 14 to 20 mm increases fluid velocity from 0.284 to 0.305 m/s and power consumption from 26.99 to 27.25 W, while reducing the stagnant region volume from 16.76% to 14.71%. The fluid velocity and impeller power consumption slightly increase with the ratio of distance between adjacent perforations. Circular‐shaped middle perforations yield higher fluid velocities and vorticity compared to lozenge‐shaped ones. The highest and lowest power consumptions are obtained by circular–circular–circular and lozenge–lozenge–lozenge perforation shape arrangements with values of 27.25 and 26.9 W, respectively.

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Numerical investigation of hydrodynamic performance and power consumption in stirred reactors with perforated Scaba 6SRGT impellers for non‐Newtonian fluid

Bin,

Li,

Wan

et al. 2024

Can J Chem Eng

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Thermal Conductivity Enhancement of Aluminum Oxide Nanofluids for Efficient Heat Dissipation in Car Radiators

Vickram,

Manikandan,

Madhu

et al. 2024

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">This study points to potentiality of studying Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) nanofluid on viscosity (μ) and thermal conductivity (K) for automotive cooling system. The Al<sub>2</sub>O<sub>3</sub> nanoparticles dispersed in 50:50 ethylene glycol-water with5 varying concentrations of 0.1, 0.2, 0.3, 0.4 and 0.5 vol%. The viscosity at 25°C, 40°C, 60°C and 80°C was measured by using a Brookfield viscometer; and thermal conductivity was measured by the transient hot wire method. The results indicate that the viscosity increases with the concentration of nanoparticles but decreases with the temperature. Due to comparative importance of thermal conductivity with increasing temperatures and nanoparticle concentrations. In nanofluid Al<sub>2</sub>O<sub>3</sub> can enhance heat transfer automotive cooling system can be good performance and efficient as well as engine, in 0.5% concentration, thermal conductivity at 25°C and increase 27% at 60°C, paranormal found for development and Al<sub>2</sub>O<sub>3</sub> nanofluids apply can be effective improvement at heat dissipation in automotive cooling system. Such a study opens the door for further developments with the automotive industry in the domain of advanced thermal management solutions.</div></div>

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A modified lumped capacitance method for transient heat transfer in a stirred tank with non-Newtonian fluid

Cited by 2 publications

References 42 publications

Numerical investigation of hydrodynamic performance and power consumption in stirred reactors with perforated Scaba 6SRGT impellers for non‐Newtonian fluid

Numerical investigation of hydrodynamic performance and power consumption in stirred reactors with perforated Scaba 6SRGT impellers for non‐Newtonian fluid

Thermal Conductivity Enhancement of Aluminum Oxide Nanofluids for Efficient Heat Dissipation in Car Radiators

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