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    Dynamic analysis of electrorheological fluid sandwich cylindrical shells with functionally graded face sheets using a semi-analytical approach

    , Article Composite Structures ; Volume 295 , 2022 ; 02638223 (ISSN) Shahali, P ; Haddadpour, H ; Shakhesi, S ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    The present research is performed to calculate the natural frequencies, loss factors, and associated mode shapes of a sandwich cylinder with moderately thick functionally graded (FG) face sheets and an electrorheological (ER) fluid core. Each face sheet is assumed to be made of FG materials, and its displacement field is estimated based on the first-order shear deformation theory, like the ER constrained layer. A suitable displacement continuity condition is considered between layers. The ER fluid used in the central middle is analyzed in the pre-yield area and considered electric field dependent. Hamilton's principle is used to acquire the motion equations related to each layer and... 

    Surveying the hybrid of radiation and magnetic parameters on Maxwell liquid with TiO2 nanotube influence of different blades

    , Article Heat Transfer ; Volume 51, Issue 6 , 2022 , Pages 4858-4881 ; 26884534 (ISSN) Abdollahzadeh, M. J ; Fathollahi, R ; Pasha, P ; Mahmoudi, M ; Samimi Behbahan, A ; Domiri Ganji, D ; Sharif University of Technology
    John Wiley and Sons Inc  2022
    Abstract
    In this paper, the impacts of Maxwell nanoliquid transmission, rectangular with titanium oxide nanoparticles are explored over the triangular, chamfer blades. The innovation of this paper is the use of the number of chamfers, rectangular, and triangular blades at the top and bottom of a stretched plate to study physical nanofluid parameters such as temperature and the effects of magnetism. Also, by determining the appropriate height and length for the blades, we achieve the best optimization of temperature and velocity of nanofluid between the plate and the blades, which improves heat transfer and with a more and better effect of magnetic effects. The finite element method is utilized for... 

    Novel thermal aspects of hybrid nanofluid flow comprising of manganese zinc ferrite MnZnFe2O4, nickel zinc ferrite NiZnFe2O4 and motile microorganisms

    , Article Ain Shams Engineering Journal ; Volume 13, Issue 5 , 2022 ; 20904479 (ISSN) Ahmad, S ; Akhter, S ; Imran Shahid, M ; Ali, K ; Akhtar, M ; Ashraf, M ; Sharif University of Technology
    Ain Shams University  2022
    Abstract
    An enhancement in heat transfer due to nanofluids is essentially required in various thermal systems. Hybrid nanofluids possess high thermal conductivity and, have ability to embellish and enhance the thermal strength of common fluids. Our concern in this paper is to examine the innovative attributes of hybrid nanofluids like Manganese zinc ferrite (MnZnFe2O4) and Nickel zinc ferrite (NiZnFe2O4) in the bio-convective flow of motile gyrotactic microorganisms subject to Darcy Forchheimer medium. The effect of activation energy has also been taken into account. Mathematical treatment is carried out via MATLAB software. The use of MnZnFe2O4 - NiZnFe2O4/H2O exhibits improved thermal... 

    Molecular interaction and magnetic dipole effects on fully developed nanofluid flowing via a vertical duct applying finite volume methodology

    , Article Symmetry ; Volume 14, Issue 10 , 2022 ; 20738994 (ISSN) Ali, K ; Ahmad, S ; Ahmad, S ; Jamshed, W ; Hussain, S. M ; Tag El Din, E.S.M ; Sharif University of Technology
    MDPI  2022
    Abstract
    Interpreting the complex interaction of nanostructured fluid flow with a dipole in a duct, with peripherally uniform temperature distribution, is the main focus of the current work. This paper also sheds light on the changes in the Nusselt number, temperature profiles, and velocity distributions for the fully developed nanofluid flow in a vertical rectangular duct due to a dipole placed near a corner of the duct. A finite volume approach has been incorporated for the numerical study of the problem. It is interesting to note the unusually lower values of the Nusselt number for the higher values of the ratio Gr/Re. Due to the nanostructure in the fluid, an enhancement in the Nusselt number has... 

    A self-similar approach to study nanofluid flow driven by a stretching curved sheet

    , Article Symmetry ; Volume 14, Issue 10 , 2022 ; 20738994 (ISSN) Ali, K ; Jamshed, W ; Ahmad, S ; Bashir, H ; Ahmad, S ; Tag El Din, E.S.M ; Sharif University of Technology
    MDPI  2022
    Abstract
    Nano-fluids have considerable importance in the field of thermal development that relates to several industrial systems. There are some key applications in recent construction systems flow, as well as microscale cooling gadgets and microstructure electric gadgets for thermal migration. The current investigation concludes the study of electrically conducting nano-fluid flow and heat transfer analysis in two-dimensional boundary layer flow over a curved extending surface in the coexisting of magnetic field, heat generation and thermal radiation. The small sized particles of copper (Cu) are taken as nanoparticles and water is assumed to be the base fluid. We used quasi-linearization and central... 

    Friction reduction of Al2O3, SiO2, and TiO2 nanoparticles added to non-Newtonian water based mud in a rotating medium

    , Article Journal of Petroleum Science and Engineering ; Volume 217 , 2022 ; 09204105 (ISSN) Misbah, B ; Sedaghat, A ; Rashidi, M ; Sabati, M ; Vaidyan, K ; Ali, N ; Omar, M. A. A ; Hosseini Dehshiri, S. S ; Sharif University of Technology
    Elsevier B.V  2022
    Abstract
    In drilling industry, energy consumption counts from 20 to 40 percent of total costs. Enhanced water-based mud (WBM) drilling fluids with nanoparticles can save energy in drilling processes. An in-house Taylor-Couette flow system (TCS) was developed at Australian University (AU) to study WBM enhanced by Al2O3, SiO2, and TiO2 nanoparticles. The TCS is really a practical tool to help well drillers with a rough idea of viscosity when nanoparticles are added. The TCS for sure cannot substitute advanced rheometry. The goal of the present experiment is to produce a rough estimate in field operation. Experimental results were examined with several rheology models in our previous publications. In... 

    Experimental evaluation of the effect of boulders and fines in biodegradable organic materials on the improvement of solar stills

    , Article Solar Energy ; Volume 247 , 2022 , Pages 453-467 ; 0038092X (ISSN) Ebrahimpour, B ; Behshad Shafii, M ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    In this research, for the first time, the effect of primary particles (boulders) and secondary particles (fines) in organic mixtures of coffee, black walnut hull, madder, and tea (which are cheap, abundant, and biodegradable) on the improvement of solar stills' daily efficiency is evaluated as an alternative to metal-based nanofluids. A laboratory still simulator is utilised under laboratory conditions to measure the organic mixture's behaviour accurately. Furthermore, the effect of the concentration of organic mixtures and the particle size of organic materials are investigated, as well as the effect of boulders and fines, independently. In addition, two identical solar still systems are... 

    Imposed magnetic field impact on vortex generation in the laminar nanofluid flow: A computational approach

    , Article International Communications in Heat and Mass Transfer ; Volume 139 , 2022 ; 07351933 (ISSN) Ali, K ; Prakash, M ; Jamshed, W ; Ibrahim, R. W ; Ahmad, S ; Raizah, Z ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Metal manufacturing plants, nuclear power plants (which produce steam, by using thermal energy yielded during the nuclear fission, for spinning enormous turbines to generate electricity), and geothermal power plants are a few in the extensive list of technologies where different processes occur in high temperature environment in the presence of strong magnetic fields. Nanofluids (NFs), on the other hand, have been successful in achieving wide acceptance as the next generation coolant in the above mentioned industries as well as in the automobiles, heat exchangers, and steam boilers, owing to their remarkable thermal performance. These observations motivate the authors to explore the change... 

    Nanofluid preparation, stability and performance for CO2 absorption and desorption enhancement: A review

    , Article Journal of Environmental Management ; Volume 313 , 2022 ; 03014797 (ISSN) Tavakoli, A ; Rahimi, K ; Saghandali, F ; Scott, J ; Lovell, E ; Sharif University of Technology
    Academic Press  2022
    Abstract
    In recent years, the importance of capturing CO2 has increased due to the necessity of minimizing climate change and the detrimental effects of CO2 emissions from industrial processes. CO2 absorption, as one of the most mature carbon capture technologies, has been improved by introducing nanosized particles into liquid absorbents. Nanofluids have been the subject of interest in many studies recently due to their tremendous impact on absorption. This review comprehensively examines the CO2 absorption behavior for nanofluids through the investigation of different absorption systems. Potential mechanisms for improving the absorption/regeneration performance of nanoabsorbents as well as the... 

    Selective fabrication of robust and multifunctional super nonwetting surfaces by diverse modifications of zirconia-ceria nanocomposites

    , Article Langmuir ; Volume 38, Issue 30 , 2022 , Pages 9195-9209 ; 07437463 (ISSN) Esmaeilzadeh, P ; Zandi, A ; Ghazanfari, M. H ; Khezrnejad, A ; Fatemi, M ; Molaei Dehkordi, A ; Sharif University of Technology
    American Chemical Society  2022
    Abstract
    The creation of surfaces with various super nonwetting properties is an ongoing challenge. We report diverse modifications of novel synthesized zirconia-ceria nanocomposites by different low surface energy agents to fabricate nanofluids capable of regulating surface wettability of mineral substrates to achieve selective superhydrophobic, superoleophobic-superhydrophilic, and superamphiphobic conditions. Surfaces treated with these nanofluids offer self-cleaning properties and effortless rolling-off behavior with sliding angles ≤7° for several liquids with surface tensions between 26 and 72.1 mN/m. The superamphiphobic nanofluid coating imparts nonstick properties to a solid surface whereby... 

    Thermal characteristics of kerosene oil-based hybrid nanofluids (Ag-MnZnFe2O4): A comprehensive study

    , Article Frontiers in Energy Research ; Volume 10 , 2022 ; 2296598X (ISSN) Ahmad, S ; Ali, K ; Haider, T ; Jamshed, W ; Tag El Din, E. S. M ; Hussain, S. M ; Sharif University of Technology
    Frontiers Media S.A  2022
    Abstract
    Hybrid nanofluids are new and most fascinating types of fluids that involve superior thermal characteristics. These fluids exhibit better heat-transfer performance as equated to conventional fluids. Our concern, in this paper, is to numerically interpret the kerosene oil-based hybrid nanofluids comprising dissimilar nanoparticles like silver (Ag) and manganese zinc ferrite (MnZnFe2O4). A numerical algorithm, which is mainly based on finite difference discretization, is developed to find the numerical solution of the problem. A numerical comparison appraises the efficiency of this algorithm. The effects of physical parameters are examined via the graphical representations in either case of... 

    Quasi-Linearization analysis for entropy generation in mhd mixed-convection flow of casson nanofluid over nonlinear stretching sheet with arrhenius activation energy

    , Article Symmetry ; Volume 14, Issue 9 , 2022 ; 20738994 (ISSN) Ali, K ; Faridi, A. A ; Ahmad, S ; Jamshed, W ; Hussain, S. M ; Tag-Eldin, E. S. M ; Sharif University of Technology
    MDPI  2022
    Abstract
    Thermal performance of magnetically driven Casson nanofluid over a nonlinear stretching sheet under the influence of entropy, activation energy and convective boundary conditions was analyzed numerically, employing the quasi-linearization method (QLM). The collective behavior of thermophoretic diffusion and Brownian motion along with special effects of viscous dissipation, thermal radiation, heat generation and joule heating are considered in the energy equation for the flow problem. The addition of nanoparticles helps to stabilize the flowing of a nanofluid and maintain the symmetry of the flowing structure. The governing highly nonlinear coupled differential equations of velocity,... 

    Monitoring of microscopic behavior of nano-enhanced colloidal gas aphron in fractured and un-fractured non-uniform porous medium

    , Article Journal of Petroleum Science and Engineering ; Volume 210 , 2022 ; 09204105 (ISSN) Tabzar, A ; Ghazanfari, M. H ; Sharif University of Technology
    Elsevier B.V  2022
    Abstract
    The present article aimed to examine the pore-scale examination of a fluid capability to block pores and fractures deduced by return permeability and the blocking ability of a novel lightweight Colloidal Gas Aphron Nano-Fluid (CGANF) in heterogeneous fractured/un-fractured porous medium. Silica (S) and fumed silica (FS) nanoparticles, Sodium Dodecyl Sulfate (SDS) anionic surfactant, and Xanthan Gum (XG) bio-polymer were employed for following up CGANF bubbles' movements in incongruous micro-models’ inclusive crack. The transparent nature of the glass micro-model provides an intuition into the lenticular behavior of CGANF bubbles in the heterogeneous porous media. Differential pressure... 

    CFD simulation of thermal performance of hybrid oil-Cu-Al2O3 nanofluid flowing through the porous receiver tube inside a finned parabolic trough solar collector

    , Article Sustainable Energy Technologies and Assessments ; Volume 50 , 2022 ; 22131388 (ISSN) Samiezadeh, S ; Khodaverdian, R ; Doranehgard, M. H ; Chehrmonavari, H ; Xiong, Q ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    In this study, we perform numerical simulations to investigate the thermal and flow characteristics of a parabolic trough solar collector equipped with a porous receiver tube and internal longitudinal fins. The heat transfer medium is a synthetic oil-Cu-Al2O3 hybrid nanofluid. We examine the thermal characteristics of the nanofluid in response to variations in several system parameters. We find that at Reynolds numbers between 5 × 103 and 5 × 105, increasing the volume fraction of Cu nanoparticles can increase the temperature gain at the exit of the receiver tube by 6.4%. Furthermore, the temperature gradient in the cross-section of the collector increases as the direct normal solar... 

    Thermal, thermodynamic and exergoeconomic investigation of a parabolic trough collector utilizing nanofluids

    , Article Applied Thermal Engineering ; Volume 206 , 2022 ; 13594311 (ISSN) Vahedi, B ; Golab, E ; Nasiri Sadr, A ; Vafai, K ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    The exploitation of solar energy facilitates the renewable energy paradigm. In this regard, parabolic trough collectors (PTC) are considered as a useful set-up to absorb solar energy. Simultaneous study of thermal, thermodynamic, and exergoeconomic performance of PTC systems paves the way for designers and manufacturers to not only have a better insight into understanding the underlying concepts about the operation of PTC systems but also to find the most effective and cost-effective circumstances. This study aims at analyzing a practical PTC system by considering an evacuated absorber tube with glass cover, non-uniform heat flux, and taking into account the convective and radiative heat... 

    Application of hybrid nanofluids in a novel combined photovoltaic/thermal and solar collector system

    , Article Solar Energy ; Volume 239 , 2022 , Pages 102-116 ; 0038092X (ISSN) Kazemian, A ; Salari, A ; Ma, T ; Lu, H ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Because of the low outflow temperature of the conventional photovoltaic thermal systems and lack of electrical production of the solar thermal collectors, a novel combined system is proposed to solve the two mentioned drawbacks. This novel system is achieved by connecting a photovoltaic thermal unit to a solar thermal collector in series. To increase the overall performance of this novel combined system, different hybrid nanofluids include (1) multiwall carbon nanotube-aluminum oxide (2) multiwall carbon nanotube-silicon carbide (3) graphene-aluminum oxide, and (4) graphene-silicon carbide are compared. The investigation is performed based on the three-dimensional simulation, and the... 

    Quasi-linearization analysis for heat and mass transfer of magnetically driven 3rd-grade (Cu-TiO2/engine oil) nanofluid via a convectively heated surface

    , Article International Communications in Heat and Mass Transfer ; Volume 135 , 2022 ; 07351933 (ISSN) Ali, K ; Faridi, A. A ; Ahmad, S ; Jamshed, W ; Khan, N ; Alam, M. M ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    The features of heat transferral capability between metallic (Cu) and non-metallic (TiO2) nanoparticles suspended in the engine-oil (EO) third-grade base-liquid has been analysed under the influence of strong magnetic field. The numerical investigation of system of coupled differential equations for third-grade nanofluid flow model is accomplished via Quasi-linearization method (QLM). The stretching horizontal sheet is heated through convective heat process assuming the special effects of thermal radiation, joule heating, heat generation and viscous dissipation in the energy equation. The mass suction and slip velocity at the boundary of the sheet has been taken into account to enhance... 

    Numerical simulation of MHD mixed convection flow of Al2O3–water nanofluid over two hot obstacles

    , Article Heat Transfer ; Volume 51, Issue 4 , 2022 , Pages 3237-3256 ; 26884534 (ISSN) Hosseini Abadshapoori, M ; Saidi, M. H ; Sharif University of Technology
    John Wiley and Sons Inc  2022
    Abstract
    The problem of cooling two hot blocks in a novel geometry using magnetohydrodynamic flow of Al2O3–water nanofluid has been studied utilizing a D2Q9 Lattice Boltzmann Model. While the Hartmann number (Ha) takes 0, 50, or 100 values, the Richardson number (Ri) varies between 0.02 and 20. Four variations of the geometry are selected. The gravity angle is set to be either (Formula presented.), (Formula presented.), or (Formula presented.). Results reveal that the Nusselt number (Nu) increases as Ri increases for all cases. Furthermore, the Hartmann number has a deteriorating effect on the Nusselt number except for low Ri numbers. In addition, the results indicate that while the geometrical... 

    Tuning the wetting properties of SiO2-based nanofluids to create durable surfaces with special wettability for self-cleaning, anti-fouling, and oil-water separation

    , Article Industrial and Engineering Chemistry Research ; Volume 61, Issue 23 , 2022 , Pages 8005-8019 ; 08885885 (ISSN) Esmaeilzadeh, P ; Ghazanfari, M. H ; Molaei Dehkordi, A ; Sharif University of Technology
    American Chemical Society  2022
    Abstract
    Surfaces with special wettability have aroused lots of attention due to their broad applications in many fields. In this work, we systematically report selective and various fabrications of nanofluids based on readily available materials such as SiO2 nanoparticles and polydimethylsiloxane to create superhydrophobic, superoleophobic, superhydrophilic/superoleophobic, and underwater superoleophobic coatings. The efficiency of prepared coatings is investigated on mineral rock plates as porous substrates via the straightforward and cost-effective solution-immersion technique. The static water contact angle of 170°, effortless bouncing of water droplets, and self-cleaning property with a near... 

    Estimating aqueous nanofluids viscosity via GEP modeling: Correlation development and data assessment

    , Article Iranian Journal of Chemistry and Chemical Engineering ; Volume 41, Issue 1 , 2022 , Pages 266-283 ; 10219986 (ISSN) Mahdaviara, M ; Rostami, A ; Shahbazi, K ; Shokrollahi, A ; Ghazanfari, M. H ; Sharif University of Technology
    Iranian Institute of Research and Development in Chemical Industries  2022
    Abstract
    This paper focuses on developing a new method that represents user-accessible correlation for the estimation of water-based nanofluids viscosity. For this, an evolutionary algorithm, namely Gene Expression Programming (GEP), was adapted based on a wide selection of literature published databanks including 819 water-based nanofluids viscosity points. The developed model utilized the base fluid viscosity as well as volume fraction and size of the nanoparticles as the inputs of the model. Several statistical parameters integrated with graphical plots were employed in order to assess the accuracy of the proposed GEP-based model. Results of the evaluation demonstrate fairly enough accuracy of the...