Electromagnetohydrodynamic two-phase flow-induced vibrations in vertical heated upward flow

Abstract

In this paper, a mathematical model is presented to determine the effect of electro-magneto-hydro-dynamic forces on steady-state fluid-induced vibrations of vapor and liquid water flow in a heated vertical channel. The two-phase flow model used in this study includes continuity, non-homogeneous Navier-Stokes, non-equilibrium temperature balance with an approximation of spherical harmonics method (P-1 model) for thermal radiation at low-pressure condition close to saturation (1–2 bars). Governing equations are solved by finite volume method. The result of the code is validated with the various experimental data's accessible in previous works. Then the code is used to estimate the effects of Lorentz forces on two-phase flow-induced vibrations. As shown, the fluid-induced vibrations increase with the increase of electro-magneto-hydrodynamic forces. As shown by the increase of Lorentz force, the fluid impact, cross-sectional, water-hammer forces, the frequency of two-phase fluctuations and peak velocities are controlled while the root-mean-square fluid force increased. Furthermore, the result has shown that the Lorentz force has not influenced the bubble departure frequency, surface tension force, and density of active nucleation site, bubble departure diameter, sound velocity, and the liquid superficial velocity. Highlights EMHD effects on two phase flow induced vibrations in a vertical channel is performed. Lorentz force controls water-hammer impact and velocities but RMS force increases. Bubble departure, nucleation, and superficial velocity unaffected by Lorentz force.

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

“…The recreation results demonstrated that the micromixing execution and response are performed by CFD method in the Microreactor [23] and four-way micromixers [24]. The effect of the magnetic force was investigated by Jamalabadi et al [25][26][27][28]. The study of [28] is useful for recent advances and pharmacology advancements in blood flow [29].…”

Magnetohydrodynamic and Nanoparticle Effects in Vertical Annular Subcooled Flow Boiling

“…The force balance conditions of the two-liquid model for any stage (i refers to fluid or vapor) in Table 3 can be found in Collier and Thome [3]. Here, the inertial force term in the interfacial momentum exchange model has been combined into single expressions to avoid the use of regime maps [16][17][18]. The Lorentz term considers powers other than weight and trituration powers, for example, magneto-hydrodynamic power.…”

“…Recently, Jamalabadi [16][17][18] worked on the EMHD effects on a straight up flow in annular pipe in a two-phase flow regime. However, the effect of MHD and nanoparticles on subcooled vertical pipe flow has not been calculated yet.…”

Numerical Study of Bubble Behavior under Gradient Flows during Subcooled Flow Boiling in Vertical Flow Channel

“…Condensation of a pure single steam bubble [9][10][11][12][13][14][15][16] and a mixture bubble [17,18] have been studied extensively. Several researchers computationally investigated the bubble nucleation, growth, departure, film-and flow boiling, and condensation [19][20][21]. The simulation performed [22] focused on bubble behaviors under low-and high-pressure, different bubble sizes, and different subcooled temperatures; and compared different velocities and bubble lives for a single bubble.…”