The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform

R. Fatehi - One of the best experts on this subject based on the ideXlab platform.

  • A SPH solver for simulating paramagnetic solid fluid Interaction in the presence of an external magnetic field
    Applied Mathematical Modelling, 2016
    Co-Authors: M.r. Hashemi, M.t. Manzari, R. Fatehi
    Abstract:

    Acknowledgment The first two authors wish to express their sincerest thanks to Iran National Science Foundation (INSF) for supporting this work under Contract Number 92021291.Peer reviewedPostprin

  • A SPH solver for simulating paramagnetic solid fluid Interaction in the presence of an external magnetic field
    Applied Mathematical Modelling, 2015
    Co-Authors: M.r. Hashemi, M.t. Manzari, R. Fatehi
    Abstract:

    Abstract The Smoothed Particle Hydrodynamics (SPH) method is extended to solve magnetostatic problems involving magnetically interacting solid bodies. In order to deal with the jump in the magnetic permeability at a fluid-solid interface, a consistent SPH scheme is utilized and a modified formulation is proposed to calculate the magnetic force density along the interface. The results of the magnetostatic solver are verified against those of the finite element method. The governing fluid flow equations are discretized using the same SPH scheme, developing an efficient method for simulating the motion of paramagnetic solid bodies in a fluid flow. The proposed algorithm is applied to a benchmark problem including a suspended paramagnetic solid body moving under the influence of a non-uniform magnetic field and the result is validated against literature. The proposed method is further verified by simulating the magneto-hydrodynamic Interaction of two suspended circular cylinders. As a more complex test-case, the evolution of a suspended magnetic chain under the influence of a rotating magnetic field is also simulated. The deformation of a chain formed by a number of paramagnetic solid bodies in a shear flow is simulated. Steady state and dynamic responses of the magnetic chain are investigated under steady and oscillatory shear flows. The effects of Reynolds number, solid volume fraction, strength of the external magnetic field and the number of solid bodies forming the chain, are discussed.

H. S. Costa Mattos - One of the best experts on this subject based on the ideXlab platform.

  • Model for structural failure of elasto-viscoplastic pipelines
    Meccanica, 1994
    Co-Authors: F. B. Freitas Rachid, H. S. Costa Mattos
    Abstract:

    In this paper a Solid-Fluid Interaction analysis for structural failure prediction of damageable elasto-viscoplastic pipes is presented. To solve the coupled non-linear equations describing the dynamics of fluid and pipe wall motions, a numerical procedure based on the method of characteristics is used. To illustrate the applicability of the model, a numerical simulation of a hypothetical accident in a simple nuclear pipeline is presented and analysed. In questo articolo si presenta un'analisi dell'interazione solido-fluido per la predizione della rottura (collasso) strutturale in condotte elasto-viscoplastiche. Per risolvere le equazioni non-lineari accoppiate che descrivono la dinamica del fluido e del movimento della parete del tubo, si usa un procedimento numerico basato sul metodo delle caratteristiche. Per illustrate l'applicabilita del modello, si presenta e si analizza una simulazione numerica di un incidente ipotetico su una tubazione appartenente ad un reattore nucleare.

  • Model for structural failure of elasto-viscoplastic pipelines
    Meccanica, 1994
    Co-Authors: Felipe Bastos De Freitas Rachid, H. S. Costa Mattos
    Abstract:

    In this paper a Solid-Fluid Interaction analysis for structural failure prediction of damageable elasto-viscoplastic pipes is presented. To solve the coupled non-linear equations describing the dynamics of fluid and pipe wall motions, a numerical procedure based on the method of characteristics is used. To illustrate the applicability of the model, a numerical simulation of a hypothetical accident in a simple nuclear pipeline is presented and analysed.

M.r. Hashemi - One of the best experts on this subject based on the ideXlab platform.

  • A SPH solver for simulating paramagnetic solid fluid Interaction in the presence of an external magnetic field
    Applied Mathematical Modelling, 2016
    Co-Authors: M.r. Hashemi, M.t. Manzari, R. Fatehi
    Abstract:

    Acknowledgment The first two authors wish to express their sincerest thanks to Iran National Science Foundation (INSF) for supporting this work under Contract Number 92021291.Peer reviewedPostprin

  • A SPH solver for simulating paramagnetic solid fluid Interaction in the presence of an external magnetic field
    Applied Mathematical Modelling, 2015
    Co-Authors: M.r. Hashemi, M.t. Manzari, R. Fatehi
    Abstract:

    Abstract The Smoothed Particle Hydrodynamics (SPH) method is extended to solve magnetostatic problems involving magnetically interacting solid bodies. In order to deal with the jump in the magnetic permeability at a fluid-solid interface, a consistent SPH scheme is utilized and a modified formulation is proposed to calculate the magnetic force density along the interface. The results of the magnetostatic solver are verified against those of the finite element method. The governing fluid flow equations are discretized using the same SPH scheme, developing an efficient method for simulating the motion of paramagnetic solid bodies in a fluid flow. The proposed algorithm is applied to a benchmark problem including a suspended paramagnetic solid body moving under the influence of a non-uniform magnetic field and the result is validated against literature. The proposed method is further verified by simulating the magneto-hydrodynamic Interaction of two suspended circular cylinders. As a more complex test-case, the evolution of a suspended magnetic chain under the influence of a rotating magnetic field is also simulated. The deformation of a chain formed by a number of paramagnetic solid bodies in a shear flow is simulated. Steady state and dynamic responses of the magnetic chain are investigated under steady and oscillatory shear flows. The effects of Reynolds number, solid volume fraction, strength of the external magnetic field and the number of solid bodies forming the chain, are discussed.

M.t. Manzari - One of the best experts on this subject based on the ideXlab platform.

  • A SPH solver for simulating paramagnetic solid fluid Interaction in the presence of an external magnetic field
    Applied Mathematical Modelling, 2016
    Co-Authors: M.r. Hashemi, M.t. Manzari, R. Fatehi
    Abstract:

    Acknowledgment The first two authors wish to express their sincerest thanks to Iran National Science Foundation (INSF) for supporting this work under Contract Number 92021291.Peer reviewedPostprin

  • A SPH solver for simulating paramagnetic solid fluid Interaction in the presence of an external magnetic field
    Applied Mathematical Modelling, 2015
    Co-Authors: M.r. Hashemi, M.t. Manzari, R. Fatehi
    Abstract:

    Abstract The Smoothed Particle Hydrodynamics (SPH) method is extended to solve magnetostatic problems involving magnetically interacting solid bodies. In order to deal with the jump in the magnetic permeability at a fluid-solid interface, a consistent SPH scheme is utilized and a modified formulation is proposed to calculate the magnetic force density along the interface. The results of the magnetostatic solver are verified against those of the finite element method. The governing fluid flow equations are discretized using the same SPH scheme, developing an efficient method for simulating the motion of paramagnetic solid bodies in a fluid flow. The proposed algorithm is applied to a benchmark problem including a suspended paramagnetic solid body moving under the influence of a non-uniform magnetic field and the result is validated against literature. The proposed method is further verified by simulating the magneto-hydrodynamic Interaction of two suspended circular cylinders. As a more complex test-case, the evolution of a suspended magnetic chain under the influence of a rotating magnetic field is also simulated. The deformation of a chain formed by a number of paramagnetic solid bodies in a shear flow is simulated. Steady state and dynamic responses of the magnetic chain are investigated under steady and oscillatory shear flows. The effects of Reynolds number, solid volume fraction, strength of the external magnetic field and the number of solid bodies forming the chain, are discussed.

Daniel Y Kwok - One of the best experts on this subject based on the ideXlab platform.

  • Apparent slip over a solid-liquid interface with a no-slip boundary condition.
    Physical review. E Statistical nonlinear and soft matter physics, 2004
    Co-Authors: Junfeng Zhang, Daniel Y Kwok
    Abstract:

    We studied solid-liquid slip by a mean-field free-energy lattice Boltzmann approach recently proposed [Phys. Rev. E 69, 032602 (2004)]. With a general bounce-back no-slip boundary condition applied to the interface, liquid slip was observed because of the specific Solid-Fluid Interactions. Our work relates interfacial slip to a more realistic Solid-Fluid Interaction and hence contact angle. The kinetic nature of LBM is manifested in this interfacial study. A small negative slip length can also be produced with a stronger Solid-Fluid attraction.