Nanofluid as heat transfer medium in microchannel sink is very common. It a promising approach to employ electrohydrodynamic(EHD) effect improve the efficiency. A modified Buongiorno's model including EHD was established. And numerical simulations on flow and for various electrode arrangements, electric field intensity frequencies were carried out. The results show that, main mechanisms elevate are chaotic convection induced by electrophoretic thermophoretic effect. electrode-pair with top...

The inertial migration of two-dimensional soft particles initially distributed uniformly in channel flow is numerically studied by employing an immersed-boundary lattice Boltzmann method coupled with a finite element method. To model particle, capsule elastic membrane separating the liquid inside from outside used. Validation tests show excellent agreement previous numerical results other researchers. Then, effects number capsules Np, bending stiffness Eb, initial position Y0′, and Reynolds...

This paper presents the performance investigation and design technology of Line Start-up Permanent Magnet Synchronous Motor(LSPMSM) with super premium efficiency, including consideration evaluation for motor starting-up, key performance, advanced finite element analysis(FEA) design, improvement verification, prototype build test, test data comparison to Premium® Efficient Induction Motor(PEIM). To assess technology, LSPMSM was built amended from a PEIM same frame, stator punching rated...

A neutrally buoyant circular particle migration in two-dimensional (2D) Poiseuille channel flow driven by pulsatile velocity is numerical studied using immersed boundary-lattice Boltzmann method (IB-LBM). The effects of Reynolds number (25≤Re≤200) and blockage ratio (0.15≤k≤0.40) on non-pulsatile are all numerically investigated for comparison. results show that, different from cases, the will migrate back to centerline with underdamped oscillation during time period zero-velocity cases....

Vortex shedding patterns in flow past inline oscillating elliptical cylinder are simulated by lattice Boltzmann and direct forcing/fictitious domain method which is validated finite volume when this fixed. The modes of vortex analyzed detail changing the amplitude frequency oscillation using first paper.

We numerically investigate the formation and ordering of staggered oblate particle pairs in three-dimensional straight ducts with a square cross section. The lattice Boltzmann method is employed to simulate rigid Newtonian liquid. effects initial axial spacing, Reynolds number, blockage ratio, aspect ratio on process, migration behavior, interparticle spacing are explored detail. Current results indicate that process from final steady state can be divided into two stages. first stage rapid...

Abstract We investigated the inertial migration of deformable particles in a two-dimensional channel flow. This study analyzes effects Reynolds number ($Re$), blockage ratio ($k$), particle ($N_p$) and reduced bending modulus ($E_b$) on formation staggered trains. The results show that stable normalized distance $d_{p_{eq}} / H$ between two is influenced by $Re$, $k$ $E_b$, where $H$ width. As increases or $E_b$ decreases, decreases. value initially then decreases with increase $Re$; when...

Cylindrical microparticle transport and deposition from electrokinetic microflow in a 90 degree bend have been numerically simulated. Under the effect of dielectrohporetic force, gravity stokes it’s found that microparticles with larger size deposit on lower region bend’s outer wall. An exponential curve efficiency versus product number shape factor is fitted based large numerical results.

This paper presents the performance investigation and design technology of a Line Start-up Permanent Magnet Synchronous Motor (LSPMSM) with super premium efficiency, including consideration evaluation for motor start-up, key performance, advanced finite element analysis FEA) design, improvement verification, prototype build test, test data comparison <TEX>$Premium^{(R)}$</TEX> Efficient Induction (PEIM). To assess technology, LSPMSM was built amended from PEIM same frame, stator punching...

Collision between 2D circular particles suspension in Couette flow is simulated by using multiple-relaxation-time based lattice Boltzmann and direct forcing/fictitious domain method this paper. The patterns of particle collisions are analyzed detail changing the velocity top bottom walls flow. It can be seen from simulation results that, while large enough, number will change little as varies.

Abstract The sedimentation of particles with various shapes and orientations in a closed channel using smoothed particle hydrodynamics is investigated this paper. continuity momentum equations both fluid solid are discretized kernel approximation the Lagrangian frame. behavior different general shapes, including circle, pentagon, square, ellipse, rectangle, triangle, at initial suspending simulated. stable equilibrium orientation (SEO) these examined, excluding circle which serves as...

We investigate the wall shear stress variation induced by soft particles modeled as capsules migrating in a channel. Interestingly, exhibits roughly linear increase both its global maximum value and magnitude with an normalized overall lateral position of when they stabilize train. Furthermore, single capsule stabilizes channel centerline, streamlines show M-like shape upper part W-like lower Meanwhile, we use vertical velocity to explain typical peak-valley-peak structure profile. For...

This paper presents the numerical simulation of flow-thermal coupling for 2 MW Doubly-Fed Induction Wind Generator (DFIG). With fundamental assumptions and corresponding boundary conditions, number grid is reduced to save calculation time. The temperature internal air different cooling system configuration calculated with commercial FEA software FLUENT without assumption. Four configurations DFIG are presented, analyzed compared in details. best has been found will be used into our production.