Numerical simulations of multi-phase electro-hydrodynamics flows using a simple incompressible smoothed particle hydrodynamics method

Almasi, F.; Shadloo, Mostafa Safdari; Hadjadj, A.; Özbulut, Murat; Tofighi, Nima; Yıldız, Mehmet

doi:10.1016/j.camwa.2019.10.029

Cited by 43 publications

(24 citation statements)

References 37 publications

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“…Many studies have been undertaken in similar papers such as [43][44][45][46][47][48]. The cylinder moves under the influence of the steady flow that was simulated, not due to externally applied force.…”

Section: Resultsmentioning

confidence: 99%

RETRACTED: Numerical Simulation of Micromixing of Particles and Fluids with Galloping Cylinder

Abdelmalek

Jamalabadi

2020

Symmetry

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Micromixers are significant segments inside miniaturized scale biomedical frameworks. Numerical investigation of the effects of galloping cylinder characteristics inside a microchannel Newtonian, incompressible fluid in nonstationary condition is performed. Governing equations of the system include the continuity equation, and Navier–Stokes equations are solved within a moving mesh domain. The symmetry of laminar entering the channel is broken by the self-sustained motion of the cylinder. A parameter study on the amplitude and frequency of passive moving cylinder on the mixing of tiny particles in the fluid is performed. The results show a significant increase to the index of mixing uses of the galloping body in biomedical frameworks in the course of micro-electromechanical systems (MEMS) devices.

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Section: Resultsmentioning

confidence: 99%

RETRACTED: Numerical Simulation of Micromixing of Particles and Fluids with Galloping Cylinder

Abdelmalek

Jamalabadi

2020

Symmetry

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“…This emanates from the fact that a nanofluid flow involves higher shear stress due to more dynamic viscosity in comparison with the base fluid flow. In keeping with the findings of other thermohydraulic studies of nanofluid flows [42][43][44][45][46] and those on other types of fluids [47][48][49][50], the power demand grows for the cases of higher heat transfer.…”

Section: Resultssupporting

confidence: 73%

Analysis of unsteady mixed convection of Cu–water nanofluid in an oscillatory, lid-driven enclosure using lattice Boltzmann method

Ardalan

Alizadeh

Fattahi

et al. 2020

J Therm Anal Calorim

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The unsteady physics of laminar mixed convection in a lid-driven enclosure filled with Cu-water nanofluid is numerically investigated. The top wall moves with constant velocity or with a temporally sinusoidal function, while the other walls are fixed. The horizontal top and bottom walls are, respectively, held at the low and high temperatures, and the vertical walls are assumed to be adiabatic. The governing equations along with the boundary conditions are solved through D2Q9 fluid flow and D2Q5 thermal lattice Boltzmann network. The effects of Richardson number and volume fractions of nanoparticles on the fluid flow and heat transfer are investigated. For the first time in the literature, the current study considers the mechanical power required for moving the top wall of the enclosure under various conditions. This reveals that the power demand increases if the enclosure is filled with a nanofluid in comparison with that with a pure fluid. Keeping a constant heat transfer rate, the required power diminishes by implementing a temporally sinusoidal velocity on the top wall rather than a constant velocity. Reducing frequency of the wall oscillation leads to heat transfer enhancement. Similarly, dropping Richardson number and raising the volume fraction of the nanoparticles enhance the heat transfer rate. Through these analyses, the present study provides a physical insight into the less investigated problem of unsteady mixed convection in enclosures with oscillatory walls. Keywords Mixed convection • Cu-water nanofluid • Sinusoidal lid-driven enclosure • Unsteady heat transfer • Lattice Boltzmann method List of symbols AR Aspect ratio c p (J kg −1 K −1) Specific heat at constant pressure F Volumetric force f (x, t) Momentum distribution function G(x, t) Temperature distribution function Gr Grashof number g (m s −2) Gravitational acceleration H (m) Height h (W m −2 K −1) Heat convection coefficient k (W m −1 K −1) Thermal conductivity Nu Nusselt number p (Pa) Fluid pressure Pr Prandtl number Re Reynolds number Ri Richardson number T (K) Temperature t (s) Time u (m s −1) Velocity component along x v (m s −1) Velocity component along y * Nader Karimi

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“…With the development of computational hardware, the simulation method has now become a common practice on some industrial problems such as complex multiphase flows 14 . There are many effective methods including the mesh‐based computational fluid dynamics method, 15,16 the smoothed particle hydrodynamics method, 17–19 the lattice Boltzmann method, 20,21 and the Runge–Kutta–Fehlberg fourth‐ to fifth‐order method 22–24 . Different methods have their scope of applications.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Wan

2021

Asia-Pacific J Chem Eng

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In this study, 2D and 3D models of corrugated plates using the volume of fluid (VOF) model were set up to simulate the influence of corrugated structure on the wettability and heat transfer. The results show that compared with the triangular corrugation, the rectangular corrugation has a slower growth rate of wetting ratio (WR) as the Weber number (We) increases under the same corrugation length Le and corrugation depth De. The average WR of the triangular corrugation is 2.8% less than that of the smooth plate. For the triangular corrugation, the higher Le contributes to improving wettability, but the average heat transfer coefficient havg first decreases to the minimum at Le = 5 mm and then increases 8% to 9% to a steady value until Le = 8 mm. WR decreases with De at We ≤ 0.76. A WR correlation considering the corrugation steepness St (St = De/Le) and a critical Re correlation corresponding to the minimum wetting rate were fitted for the liquid oxygen. As the inclination angle ϕ increases, the average film thickness decreases and havg increases until ϕ = 75°, while the variation rate slows down afterwards. At Re = 1200, havg has a decreasing trend at St ≤ 0.13, increases at St ≥ 0.14 and reaches a plateau after St = 0.24 as St increases. It increases by 30.6%, 47.4%, and 44.4% for the inclination angle ϕ = 30°, 60°, 90° cases from St = 0.14 to 0.24. The enhancement is caused by the vortices existing at St ≥ 0.14.

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Numerical simulations of multi-phase electro-hydrodynamics flows using a simple incompressible smoothed particle hydrodynamics method

Cited by 43 publications

References 37 publications

RETRACTED: Numerical Simulation of Micromixing of Particles and Fluids with Galloping Cylinder

RETRACTED: Numerical Simulation of Micromixing of Particles and Fluids with Galloping Cylinder

Analysis of unsteady mixed convection of Cu–water nanofluid in an oscillatory, lid-driven enclosure using lattice Boltzmann method

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

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