Computational fluid dynamics analysis of the effect of throat diameter on the fluid flow and performance of ejector

Salehi, Mohammadreza; Pourmahmoud, Nader; Hassanzadeh, Amir; Hoseinzadeh, Siamak; Heyns, P.S.

doi:10.1108/hff-12-2019-0871

Cited by 8 publications

(8 citation statements)

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“…In the future, the design computing spline swarm paradigm CSA-GA-SQP is a promising alternative numerical solver to be implemented for the solution of stiff nonlinear systems representing the complex scenarios of computational fluid dynamics problems [63][64][65][66][67][68][69][70].…”

Section: Discussionmentioning

confidence: 99%

Design of Spline–Evolutionary Computing Paradigm for Nonlinear Thin Film Flow Model

2021

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A novel design of stochastic numerical computing method is introduced for computational fluid dynamics problem governed with nonlinear thin film flow (TFF) system by exploiting the competency of polynomial splines for discretization and optimization with evolutionary computing aided with brilliance of local search. The TFF model of second grade fluid is represented with nonlinear second-order differential system. The aim of the present work is to exploit the cubic spline approach (CSA) to transform the differential equations for TFF model into an equivalent set of nonlinear equations. The approximation in mean squared error sense is introduced for the formulation of cost function for solving the nonlinear system of equations representing TFF model. The optimization of the decision variables of the cost function is carried out with global search efficacy of evolution by genetic algorithms (GAs) integrated with sequential quadratic programming (SQP) for speedy adjustments. The designed spline-evolutionary computing paradigm, CSA-GA-SQP, is evaluated for different scenarios of TFF model by variation of second grade and magnetic parameters, as well as variation in the length of splines. Results endorsed the worth of CSA-GA-SQP solver as an efficient alternative, reliable, stable, and accurate framework for the variants of nonlinear TFF systems on the basis of multiple autonomous executions. The design computing spline paradigm CSA-GA-SQP is a promising alternative numerical solver to be implemented for the solution of stiff nonlinear systems representing the complex scenarios of computational fluid dynamics problems.

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Section: Discussionmentioning

confidence: 99%

Design of Spline–Evolutionary Computing Paradigm for Nonlinear Thin Film Flow Model

2021

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“…Khaitan et al investigated the development of a Simulinkbased model for each of the individual components and have shown that this method can be suitable for designing entire compressed-air energy storage (CAES) systems (Khaitan and Raju, 2013). In recent years, various devices have been proposed to extract tidal energy, which is essentially underwater versions of wind turbines and follow similar physical principles (Vittal Shenoy et al, 2020 andSalehi et al, 2021). Other proposed systems use vertical and horizontal axis turbines or oscillating blades and venturi constrictors (Salehi et al, 2021(Salehi et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, various devices have been proposed to extract tidal energy, which is essentially underwater versions of wind turbines and follow similar physical principles (Vittal Shenoy et al , 2020 and Salehi et al , 2021). Other proposed systems use vertical and horizontal axis turbines or oscillating blades and venturi constrictors (Salehi et al , 2021). López et al (2015) analyzed the effect of wave conditions, turbine damping, and tidal level on the efficiency of pneumatic energy conversion, which occurs in the oil-water compartment.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of fluid dynamic performance of turbulent flow over Hunter turbine with variable angle of blades

Nazarieh

Kariman

Hoseinzadeh

2022

HFF

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Purpose This study aims to simulate Hunter turbine in Computer Forensic Examiner (CFX) environment dynamically. For this purpose, the turbine is designed in desired dimensions and simulated in ANSYS software under a specific fluid flow rate. The obtained values were then compared with previous studies for different values of angles (θ and α). The amount of validation error were obtained. Design/methodology/approach In this research, at first, the study of fluid flow and then the examination of that in the tidal turbine and identifying the turbines used for tidal energy extraction are performed. For this purpose, the equations governing flow and turbine are thoroughly investigated, and the computational fluid dynamic simulation is done after numerical modeling of Hunter turbine in a CFX environment. Findings The failure results showed; 11.25% for the blades to fully open, 2.5% for blades to start, and 2.2% for blades to close completely. Also, results obtained from three flow coefficients, 0.36, 0.44 and 0.46, are validated by experimental data that were in high-grade agreement, and the failure value coefficients of (0.44 and 0.46) equal (0.013 and 0.014), respectively. Originality/value In this research, at first, the geometry of the Hunter turbine is discussed. Then, the model of the turbine is designed with SolidWorks software. An essential feature of SolidWorks software, which was sorely needed in this project, is the possibility of mechanical clamping of the blades. The validation is performed by comparing the results with previous studies to show the simulation accuracy. This research’s overall objective is the dynamical simulation of Hunter turbine with the CFX. The turbine was then designed to desired dimensions and simulated in the ANSYS software at a specified fluid flow rate and verified, which had not been done so far.

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“…The SIMPLE method has been widely used in different studies for different systems. The studies of (Abdollahzadeh Jamalabadi et al , 2017), (Hoseinzadeh et al , 2019), (Chien et al , 2020), (Chamkha et al , 2017), (Yan et al , 2019), (Bahiraei et al , 2019), (Salehi et al , 2020), (Yarmand et al , 2014), (Ghalambaz et al , 2017), (Hosseinzadeh et al , 2017), (Rahmanian et al , 2014) and (Garoosi et al , 2015) can be given as some examples that show the broad range of application and capability of SIMPLE method.…”

Section: Introductionmentioning

confidence: 99%

Using computational fluid dynamics for different alternatives water flow path in a thermal photovoltaic (PVT) system

Hoseinzadeh

Sohani

Samiezadeh

et al. 2020

HFF

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Purpose This study aim to use the finite volume method to solve differential equations related to three-dimensional simulation of a solar collector. Modeling is done using ANSYS-fluent software program. The investigation is done for a photovoltaic (PV) solar cell, with the dimension of 394 × 84 mm2, which is the aluminum type and receives the constant heat flux of 800 W.m−2. Water is also used as the working fluid, and the Reynolds number is 500. Design/methodology/approach In the present study, the effect of fluid flow path on the thermal, electrical and fluid flow characteristics of a PV thermal (PVT) collector is investigated. Three alternatives for flow paths, namely, direct, curved and spiral for coolant flow, are considered, and a numerical model to simulate the system performance is developed. Findings The results show that the highest efficiency is achieved by the solar cell with a curved fluid flow path. Additionally, it is found that the curved path’s efficiency is 0.8% and 0.5% higher than that of direct and spiral paths, respectively. Moreover, the highest pressure drop occurs in the curved microchannel route, with around 260 kPa, which is 2% and 5% more than the pressure drop of spiral and direct. Originality/value To the best of the authors’ knowledge, there has been no study that investigates numerically heat transfer, fluid flow and electrical performance of a PV solar thermal cell, simultaneously. Moreover, the effect of the microchannel routes which are considered for water flow has not been considered by researchers so far. Taking all the mentioned points into account, in this study, numerical analysis on the effect of different microchannel paths on the performance of a PVT solar collector is carried. The investigation is conducted for the Reynolds number of 500.

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Computational fluid dynamics analysis of the effect of throat diameter on the fluid flow and performance of ejector

Cited by 8 publications

References 50 publications

Design of Spline–Evolutionary Computing Paradigm for Nonlinear Thin Film Flow Model

Design of Spline–Evolutionary Computing Paradigm for Nonlinear Thin Film Flow Model

Numerical simulation of fluid dynamic performance of turbulent flow over Hunter turbine with variable angle of blades

Using computational fluid dynamics for different alternatives water flow path in a thermal photovoltaic (PVT) system

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