Non-Newtonian based micropolar fluid flow over nonlinear starching cylinder under Soret and Dufour numbers effects

Khan, Aamir Abbas; Abbas, Nadeem; Nadeem, Sohail; Shi, Qiu-Hong; Malik, M.Y.; Ashraf, Muhammad; Hussain, Shafiq

doi:10.1016/j.icheatmasstransfer.2021.105571

Cited by 46 publications

(12 citation statements)

References 49 publications

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“…The material of the discrete phase model replaced pesticide with water. There are three DPM [39,40] boundary conditions, which are namely "reflect", "escape", and "trap". The canopy boundary was set to trap according to the work object; thus, the droplets would have been captured when they reached the surface.…”

Section: Geometric Modelmentioning

confidence: 99%

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

et al. 2022

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With the increase in orchard areas and the transfer of rural labor, various air-assisted sprayers have been widely used in China. However, the problem of off-target drift still exists, which has caused pesticide waste and environmental pollution. In order to improve the droplet deposition in the canopy of fruit trees, a V-shaped anti-drift spray device with multi-airflow synergy was designed in this paper. A droplet spatial motion model was constructed, and the anti-drift mechanism of multi-airflow synergy was clarified based on particle dynamics analysis. The influences of spray pressure and V-shaped wind speed on droplet movement were investigated by Matlab, and the experimental results showed that the machine’s anti-drift effect was better when the V-shaped wind speed ranged from 15 m/s to 25 m/s. According to modern orchards with low root stock in a high-density planting, a simulation model of the flow field between the spray device and the fruit trees canopy was established by the method of computational fluid mechanics (CFD). By considering crosswind speed, V-shaped wind speed, and spray pressure, three-level simulation experiments of droplet deposition were designed for each factor using a partial multivariate orthogonal regression method. The influence of V-shaped wind speed on the droplets’ spatial distribution was analyzed, and the prediction model of the drift distance of the droplets’ deposition center was established. The simulation results showed that the three factors had a significant influence on the droplets’ deposition characteristics, and the degree from big to small was V-shaped wind speed, crosswind speed, and spray pressure. The fitting degree of the prediction model was high, and the correlation coefficient was 0.998. The anti-drift experiments of the machine were carried out, and the results showed that when the crosswind speed, the spray pressure, and V-shaped wind speed were 2.2 m/s, 0.52 MPa, and 20.8 m/s, respectively, the droplet drift rate was 29.2% lower than that of single-airflow. The drift distance of the droplets deposition center was 5.0 cm, which was consistent with the prediction model. The research can provide a basis for the design and parameters optimization of the similar sprayers used in modern orchards with low root stock in a high-density planting.

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Section: Geometric Modelmentioning

confidence: 99%

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

et al. 2022

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“…The same conclusion has also been drawn by Jawad et al [28] in their research on Darcy-Forchheimer radiative nanofluid flow with Marangoni convection. Meanwhile, in the study performed by Khan et al [29] towards the non-Newtonian micropolar fluid flow of an expandable cylinder, the boost of the Dufour effect negatively impacted the temperature profile. Several other recent works of research regarding Dufour and Soret effects can be retrieved in the studies conducted by Salmi et al [30], Yinusa et al [31], Pal et al [32], and Sheri et al [33].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

et al. 2022

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The widespread application of hybrid nanofluid in real applications has been accompanied by a large increase in computational and experimental research. Due to the unique characteristics of hybrid nanofluid, this study aspires to examine the steady two-dimensional mixed convection stagnation point flow of a hybrid nanofluid past a vertical plate with radiation, Dufour, and Soret effects, numerically. The formulations of the specific flow model are presented in this study. The model of fluid flow that is expressed in the form of partial differential equations is simplified into ordinary differential equations via the transformation of similarity, and then solved numerically by using the boundary value problem solver known as bvp4c in MATLAB, which implements the finite difference scheme with the Lobatto IIIa formula. Two possible numerical solutions can be executed, but only the first solution is stable and meaningful from a physical perspective when being evaluated via a stability analysis. According to the findings, it is sufficient to prevent the boundary layer separation by using 2% copper nanoparticles and considering the lesser amount of Dufour and Soret effects. The heat transfer rate was effectively upgraded by minimizing the volume fraction of copper and diminishing the Dufour effect. Stronger mixed convection would lead to maximum skin friction, mass transfer, and heat transfer rates. This important preliminary research will give engineers and scientists the insight to properly control the flow of fluids in optimizing the related complicated systems.

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“…The consequences of thermal radiation, Dufour, and Soret effects on second-grade liquid were discussed by Shojaei et al 39 Imtiaz et al 40 have deliberated the heat transfer of viscous liquid over a curved surface under Joule heating. The impacts of Dufour and Soret number on micropolar fluid at nonlinear stretching cylinder have been studied by Khan et al 41 Consequences of Dufour and Soret, chemical reaction on Casson fluid flow through a surface have been examined by Ramudu et al 42 This study aims to compare the linear and nonlinear stretching curved sheet effect on hybrid nanofluid flow with the Soret-Dufour number as in mechanics, heat transfer can be controlled by using a nonlinearly stretching sheet. This article contains four sections.…”

Section: Introductionmentioning

confidence: 99%

“…The consequences of thermal radiation, Dufour, and Soret effects on second‐grade liquid were discussed by Shojaei et al 39 Imtiaz et al 40 have deliberated the heat transfer of viscous liquid over a curved surface under Joule heating. The impacts of Dufour and Soret number on micropolar fluid at nonlinear stretching cylinder have been studied by Khan et al 41 Consequences of Dufour and Soret, chemical reaction on Casson fluid flow through a surface have been examined by Ramudu et al 42…”

Section: Introductionmentioning

confidence: 99%

Comparative study on hybrid nanofluid flow of Ag–CuO/H₂O over a curved stretching surface with Soret and Dufour effects

2022

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The purpose of the study is to discuss the comparison of the linear and nonlinear stretching sheets on the heat transfer over a curved surface spiraling in a circle with radial distance R. Additionally the consequences of Soret-Dufour in the presence of injection velocity and heat source/sink are investigated in the article.Silver and Copper Oxide are taken as hybrid nanoparticles with water as foundation fluid. Leading equations are converted to nonlinear ordinary differential equations taking some relevant transformations and solved with the combination of the shooting method and RK-4th order method. MAPLE software is used to plot graphs and numerical charts. Flow features are examined for different pertinent parameters. Physical quantities like Sherwood number, Nusselt number, and so forth, are evaluated numerically for different nondimensional numbers. The result substantiates that improving the Dufour number boost the fluid flow and fluid temperature but the opposite behavior is seen in the concentration profile. It is observed that a linearly stretching sheet gives better fluid behaviors compared to nonlinear stretching sheet.

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Non-Newtonian based micropolar fluid flow over nonlinear starching cylinder under Soret and Dufour numbers effects

Cited by 46 publications

References 49 publications

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

Comparative study on hybrid nanofluid flow of Ag–CuO/H₂O over a curved stretching surface with Soret and Dufour effects

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Non-Newtonian based micropolar fluid flow over nonlinear starching cylinder under Soret and Dufour numbers effects

Cited by 46 publications

References 49 publications

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation

Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

Comparative study on hybrid nanofluid flow of Ag–CuO/H2O over a curved stretching surface with Soret and Dufour effects

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Comparative study on hybrid nanofluid flow of Ag–CuO/H₂O over a curved stretching surface with Soret and Dufour effects