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S. Mohammed Ibrahim¹, P. Vijaya Kumar², G. Lorenzini^3,*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 855-868, 2023, DOI:10.32604/fdmp.2022.019796 - 02 November 2022
Abstract In this study, a radiative MHD stagnation point flow over a nonlinear stretching sheet incorporating thermophoresis and Brownian motion is considered. Using a similarity method to reshape the underlying Partial differential equations into a set of ordinary differential equations (ODEs), the implications of heat generation, and chemical reaction on the flow field are described in detail. Moreover a Homotopy analysis method (HAM) is used to interpret the related mechanisms. It is found that an increase in the magnetic and velocity exponent parameters can damp the fluid velocity, while thermophoresis and Brownian motion promote specific thermal More >

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Wenbin Luo^1,*, Lingfeng Tang¹, Yuting Yan², Yifang Shi¹
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 869-899, 2023, DOI:10.32604/fdmp.2022.022280 - 02 November 2022
Abstract The aim of the study is to determine the optimal structural parameters for a plastic centrifugal pump inducer within the framework of an orthogonal experimental method. For this purpose, a numerical study of the related flow field is performed using CFX. The shaft power and the head of the pump are taken as the evaluation indicators. Accordingly, the examined variables are the thickness (S), the blade cascade degree (t), the blade rim angle (β1), the blade hub angle (β2) and the hub length (L). The impact of each structural parameter on each evaluation index is More >

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El Hadji I Cisse^1,*, Baye Alioune Ndiogou^1,2, Soumaïla Tigampo¹, Ababacar Thiam^1,3, Dorothé Azilinon¹
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 901-910, 2023, DOI:10.32604/fdmp.2022.021973 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract A study is conducted to optimize the geometry of a solar chimney equipped with a horizontal absorber in order to improve its performances in relation to the provision of ventilation. The problem is tackled through numerical solution of the governing equations for mass, momentum and energy in their complete three-dimensional and unsteady formulation. The numerical framework also includes a turbulence model (k-ε) and a radiant heat transfer (DO) model. Moreover, a Multi-Objective Genetic Algorithm (MOGA) is employed to derive the optimal configuration of the considered solar chimney. It is shown that an air velocity of More >

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Bobo Luo^1,*, Yunbin Xiong¹, Zhuoyi Li², Zhanqing Qu³, Fenggang Liu¹, Tiankui Guo³, Zugui Yang¹, Yina Shi¹
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 911-928, 2023, DOI:10.32604/fdmp.2022.022761 - 02 November 2022
Abstract Due to its long lifespan and high sand-removal efficiency, gravel packing is one of the most applied sand control methods during the recovery of reservoirs with sanding problems. The blockage and retention of injected sand in a gravel pack is a complex process affected by multiple mechanisms. The majority of existing studies based on the phenomenological deep bed filtration (DBF) theory focused on the gravel pack’s overall permeability damage and failed to obtain the inner-pore particle distribution pattern. In this work, experiments and simulations were carried out to reveal the particle distribution in a gravel More >

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609

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U. S. Mahabaleshwar¹, T. Anusha^1,*, M. EL Ganaoui², R. Bennacer³
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 929-939, 2023, DOI:10.32604/fdmp.2022.021996 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract The impacts of radiation, mass transpiration, and volume fraction of carbon nanotubes on the flow of a Newtonian fluid past a porous stretching/shrinking sheet are investigated. For this purpose, three types of base liquids are considered, namely, water, ethylene glycol and engine oil. Moreover, single and multi-wall carbon nanotubes are examined in the analysis. The overall physical problem is modeled using a system of highly nonlinear partial differential equations, which are then converted into highly nonlinear third order ordinary differential equations via a suitable similarity transformation. These equations are solved analytically along with the corresponding More >

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Abdelatif Merabtine^1,*, Abdelhamid Kheiri², Salim Mokraoui³, Lyes Bellagh¹
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 941-951, 2023, DOI:10.32604/fdmp.2023.022029 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract Occupants of highly glazed buildings often suffer from thermal discomfort during the mid-seasons when no shadings are used in such buildings, especially when inertial heating systems are used. The present study is devoted to evaluating the impact of long solar beam exposure on the internal thermal discomfort in glazed spaces when heating is implemented through a floor system. A comprehensive experimental study is carried out using an experimental bi-climatic chamber which is fully monitored and controlled, allowing realistic simulations of the dynamic movement of the sun patch on a heated slab. The findings show that More >

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Feriel Mustapha^1,2,*, Marwa El Yassi^1,2, Ikram El Abbassi^1,2, Abdelhak Kaci², Elhadj Kadri², A-Moumen Darcherif³
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 953-958, 2023, DOI:10.32604/fdmp.2022.022028 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract A study is presented on the feasibility of an approach based on the combination of Phase Change Materials (PCM) with metal walls in container-type houses. This line of research finds its motivations in recent trends in the energy and building sectors about energy consumption reduction. Another important objective concerns possible improvements in the comfort provided by such houses during the summer period. The results obtained through numerical solution of the governing equations accounting for heat transfer and latent heat effects associated with the PCM show that the indoor temperature can be reduced with a varying More >

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611

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Jianghua Cheng^1,2, Xiaojian Li², Lei Shi^3,*, Kangbo Lu³, Ling Leng³
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 959-975, 2023, DOI:10.32604/fdmp.2023.023687 - 02 November 2022
Abstract Power deterioration is a major problem for diesel engines operating at high altitudes. This problem stems from the limited availability of turbocharger energy, which is not enough to increase the boost pressure to the required level. In this study, a control strategy is introduced in order to achieve engine power recovery at different altitudes. It is shown that as the altitude increases from 0 to 4500 m, the required boost pressure ratio increases from 2.4 to 4.3. The needed turbocharger energy should be increased accordingly by 240%, and the TCC (turbine characterization coefficient) should be More >

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560

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Toufik Sahabi^1,*, Smain Balaska²
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 977-990, 2023, DOI:10.32604/fdmp.2022.022059 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract The heat transfer equation is used to determine the heat flow by conduction through a composite material along the real axis. An analytical dimensionless analysis is implemented in the framework of a separation of variables method (SVM). This approach leads to an Eigenvalues problem that is solved by the Newton’s method. Two types of dynamics are found: An unsteady condition (in the form of jumps or drops in temperatures depending on the considered case), and a permanent equilibrium (tending to the ambient temperature). The validity and effectiveness of the proposed approach for any number of More >

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Rabeb Toujani, Nahla Bouaziz^*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 991-1001, 2023, DOI:10.32604/fdmp.2022.022239 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract A hybrid heat pump (compression/absorption) with an integrated thermal photovoltaic unit is studied. The considered working fluids are organic mixtures: R245fa/DMAC and R236fa/DMAC, chosen for their low Global Warming Potential. The main objective is the optimization of energy efficiency in order to minimize the environmental impact through the implementation of a sustainable strategy. It is shown that Exergy Analysis itself is a valuable tool in energy integration. Within the imposed framework of minimizing total annual costs, entropy analysis can be instrumental in determining the optimal plant concept, optimizing energy conversion and use, and improving profitability. More >

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Surendrababu Kuppusamy^1,*, Prabhahar Muthuswamy², Muthurajan Kumarasamy³, Sendilvelan Subramanian⁴
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1003-1014, 2023, DOI:10.32604/fdmp.2022.022262 - 02 November 2022
（This article belongs to the Special Issue: Advances in Fluid Dynamics and Functional Materials)
Abstract Biodiesel fuel is a potential alternative energy source for diesel engines due to its physiochemical characteristics relatively similar to those of traditional diesel fuel. In this study, the performance, emission, and combustion features of a mono cylinder DI diesel engine are assessed using 20% Pumpkin seed methyl ester (PSOME20) and considering varying injection pressures (200, 220, 240, and 260 bar). The considered Pumpkin seed oil is converted into pumpkin biodiesel by transesterification and then used as fuel. The findings demonstrate that the Brake Thermal Efficiency (BTE) of PSOME20 can be raised by 1.68%, and the More >

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Najeh Ghilen^1,3,*, Mohammed El Ganaoui³, Slimane Gabsi^1,2, Riad Benelmir³
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1015-1026, 2023, DOI:10.32604/fdmp.2022.022285 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract A dynamic model is presented for a chiller working with a composite adsorbent (silica activated carbon/CaCl₂)–water pair in a solar-biomass cooling installation. The main objective is determining a link between two possible evaporator configurations and the refrigerator’s performances. The two considered evaporators work at different pressure levels. The related time evolution profiles of temperature, pressure and water content are studied. Moreover, the effects of hot water inlet temperature and cooling water inlet temperature on the specific cooling capacity (SCP) and coefficient of performance (COP) are predicted by means of numerical simulations. The results show that an More >

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Jialin Tong^1,2, Yan Zhang², Ruikang Wu¹, Xiaojuan Qi¹, Xuemin Ye^2,*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1027-1041, 2023, DOI:10.32604/fdmp.2022.022303 - 02 November 2022
Abstract A 600 MW coal-fired boiler with a four-corner tangential combustion mode is considered here to study the combustion features and pollutant emissions at different loads for large-percentages of blending dried sludges. The influence of the over-fired air (OFA) coefficient is examined and the impact of the blending ratio on the boiler operation is explored. The results show that for low blending ratios, a slight increase in the blending ratio can improve the combustion of bituminite, whereas a further increase leads to the deterioration of the combustion of blended fuels and thus reduces the boiler efficiency. Enhancing… More >

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Lazreg Hadji^1,2,*, Fabrice Bernard³, Nafissa Zouatnia⁴
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1043-1054, 2023, DOI:10.32604/fdmp.2022.022327 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract The bending and free vibration of porous functionally graded (PFG) beams resting on elastic foundations are analyzed. The material features of the PFG beam are assumed to vary continuously through the thickness according to the volume fraction of components. The foundation medium is also considered to be linear, homogeneous, and isotropic, and modeled using the Winkler-Pasternak law. The hyperbolic shear deformation theory is applied for the kinematic relations, and the equations of motion are obtained using the Hamilton’s principle. An analytical solution is presented accordingly, assuming that the PFG beam is simply supported. Comparisons with More >

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Roudouane Laouar^1,*, Olaf Wünsch²
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1055-1066, 2023, DOI:10.32604/fdmp.2022.022677 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract In this work, a parametric two-dimensional computational fluid dynamics (CFD) analysis of a solar chimney power plant (a prototype located in Manzanares, Spain) is presented to illustrate the effects of the solar radiation mode in the collector on the plant performances. The simulations rely on a mathematical model that includes solar radiation within the collector; energy storage; air flow and heat transfer, and a turbine. It is based on the Navier-Stokes equation for turbulent flow formulated according to the standard k-ε model. Moreover, the Boussinesq approach is used to account for the fluid density variations. More >

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Kolthoum Missaoui^1,2,*, Nader Frikha^2,3, Abdelhamid Kheiri¹, Slimane Gabsi^2,3, Mohammed El Ganaoui⁴
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1067-1081, 2023, DOI:10.32604/fdmp.2022.021969 - 02 November 2022
（This article belongs to the Special Issue: Materials and Energy an Updated Image for 2021)
Abstract A study is conducted on the performances of a solar powered continuous-adsorption refrigerator considering two particular days as references cases, namely, the summer solstice (June 21st) and the autumn equinox (September 21st). The cooling capacity, system performance coefficient and the daily rate of available cooling energy are assessed. The main goal is to compare the performances of a solar adsorption chiller equipped with a hot water tank (HWT) with an equivalent system relying on solar collectors with no heat storage module. The daily cooling rates for the solar refrigerator are found to be 102.4 kWh More >

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