Particle Mass Loading Effect on a Two-Phase Turbulent Downward Jet Flow

1993 ◽  
Vol 10 (4) ◽  
pp. 173-181 ◽  
Author(s):  
Biing-Hwang Jou ◽  
Horn-Jiunn Sheen ◽  
Yuh-Tzyh Lee
Keyword(s):  
Jet Flow ◽  
Particle Mass ◽  
Mass Loading ◽  
Two Phase ◽  
Loading Effect

scholarly journals A study of the correlation between fine particle mass loading effect and frequency shift of a bare QCM

2020 ◽  
Author(s):  
Arif Budianto ◽  
Arinto Yudi Ponco Wardoyo ◽  
Masruroh ◽  
Hari Arief Dharmawan ◽  
Muhammad Nurhuda
Keyword(s):  
Frequency Shift ◽  
Fine Particle ◽  
Particle Mass ◽  
Mass Loading ◽  
Loading Effect

Numerical Study on the Erosion Characteristics of U-Type Bend for Gas Solid Flow

2017 ◽  
Author(s):  
Yu Wang ◽  
Qi He ◽  
Ming Liu ◽  
Weixiong Chen ◽  
Junjie Yan
Keyword(s):  
Particle Size ◽  
Erosion Rate ◽  
Loading Rate ◽  
Pipe Wall ◽  
Numerical Study ◽  
Pulverized Coal ◽  
Mass Loading ◽  
Two Phase ◽  
Inlet Velocity ◽  
Pipe System

In pulverized coal-fired plant, the U-type bend is commonly used in flue gas and pulverized coal pipe system to due to the constraints of outer space. And gas-solid two-phase flow exists in these pipelines. The erosion of the pipe has significant effect on the safety and reliability of pipelines. In present paper, the erosion characteristics of U-type bend were investigated through CFD (Computational Fluid Dynamics) method. The wear distribution on the pipe wall was obtained. And the particle flow characteristics in U-type bend were analyzed. The influence of inlet velocity, mass loading rate and particle size on the erosion rate was studied as well. Result suggested that the maximum erosion rate increases exponentially with the increase of inlet velocity. And maximum erosion rate increases linearly with the increasing mass loading rate. Increasing particle size can aggravate the wear on the pipe wall.

Investigation on Resonance Effects of Closely Resonating Nano-Pillars Attached to SAW Resonator

2011 ◽  
Vol 403-408 ◽  
pp. 1183-1187
Author(s):  
N. Ramakrishnan ◽  
Harshal B. Nemade ◽  
Roy Paily Palathinkal
Keyword(s):  
Acoustic Wave ◽  
Resonance Frequency ◽  
Frequency Shift ◽  
Fem Simulation ◽  
Mass Loading ◽  
Loading Effect ◽  
Resonance Effects ◽  
Additional Information ◽  
Resonance Frequency Shift ◽  
Small Change

Surface acoustic wave (SAW) sensors form an important class of micro sensors in the microelecto mechanical systems (MEMS) family. Mass loading effect of a sensing medium is one of the prime sensing principles in SAW sensors. Recently we reported mass loading effect of high aspect ratio nano-pillars attached to a SAW resonator. We observed increase in resonance frequency of the SAW resonator in addition to the general mass loading characteristics. We concluded that when the resonance frequency of the pillar is equal to the SAW resonator frequency, the resonance frequency shift caused by mass loading of pillar tends to a negligible value. When such resonating pillars are used as sensing medium in SAW sensors, even a very small change in the dimension of the pillar will offer significant resonance frequency shift. Accordingly, high sensitive SAW sensors can be developed. However in practice it’s quite difficult to manufacture nano-pillars with accurate dimensions such that they resonate with SAW resonator. There is more probability that the pillars may closely resonate with SAW device and offer mass loading. In the present work we have extended our earlier work and performed finite element method (FEM) simulation to study the insight physics of the closely resonating pillars and their effects on acoustic wave propagating on SAW substrate. In this paper we present the discussion on the resonance effects of typical closely resonating pillars on resonance frequency spectrum of the SAW resonator and observations in the pressure wave at the contact surface of the pillar and SAW resonator substrate. It is observed that when the nano-pillars closely resonate with SAW resonator, the pillar oscillations combine with waves propagating in the substrate and introduce beat frequencies. The results and discussion of this paper adds additional information in designing SAW based coupled resonating systems.

Performance of a slit virtual impactor operated at high particle mass loading

2005 ◽  
Vol 36 (4) ◽  
pp. 541-547 ◽  
Author(s):  
Satyanarayanan Seshadri ◽  
Denis J. Phares ◽  
Taekyun Kim ◽  
Kenneth D. Kihm ◽  
Don D. Smith ◽  
...  
Keyword(s):  
Particle Mass ◽  
Mass Loading ◽  
High Particle ◽  
Virtual Impactor

scholarly journals On the transition between turbulence regimes in particle-laden channel flows

2018 ◽  
Vol 845 ◽  
pp. 499-519 ◽  
Author(s):  
Jesse Capecelatro ◽  
Olivier Desjardins ◽  
Rodney O. Fox
Keyword(s):  
Reynolds Number ◽  
Fluid Phase ◽  
Stokes Number ◽  
Channel Flows ◽  
High Mass ◽  
Inertial Particles ◽  
Mass Loading ◽  
Two Phase ◽  
Phase Dynamics ◽  
Wide Range

Turbulent wall-bounded flows exhibit a wide range of regimes with significant interaction between scales. The fluid dynamics associated with single-phase channel flows is predominantly characterized by the Reynolds number. Meanwhile, vastly different behaviour exists in particle-laden channel flows, even at a fixed Reynolds number. Vertical turbulent channel flows seeded with a low concentration of inertial particles are known to exhibit segregation in the particle distribution without significant modification to the underlying turbulent kinetic energy (TKE). At moderate (but still low) concentrations, enhancement or attenuation of fluid-phase TKE results from increased dissipation and wakes past individual particles. Recent studies have shown that denser suspensions significantly alter the two-phase dynamics, where the majority of TKE is generated by interphase coupling (i.e.  drag) between the carrier gas and clusters of particles that fall near the channel wall. In the present study, a series of simulations of vertical particle-laden channel flows with increasing mass loading is conducted to analyse the transition from the dilute limit where classical mean-shear production is primarily responsible for generating fluid-phase TKE to high-mass-loading suspensions dominated by drag production. Eulerian–Lagrangian simulations are performed for a wide range of particle loadings at two values of the Stokes number, and the corresponding two-phase energy balances are reported to identify the mechanisms responsible for the observed transition.

Mass loading effect of shock accelerometers

2005 ◽  
Vol 117 (4) ◽  
pp. 2386-2386
Author(s):  
Lixue Wu ◽  
George S. K. Wong ◽  
Peter Hanes ◽  
Won‐Suk Ohm
Keyword(s):  
Mass Loading ◽  
Loading Effect

Numerical calculations for two-phase jet flow of a mixture of pulverized-coal and gas

1985 ◽  
Vol 1 (1) ◽  
pp. 37-48
Author(s):  
Guo Bentie ◽  
Fan Zhengqiao ◽  
Zhang Benzhao ◽  
Ding Jianmin
Keyword(s):  
Jet Flow ◽  
Pulverized Coal ◽  
Numerical Calculations ◽  
Two Phase

Erosion-corrosion of an Aluminum Alloy in Two Phase Jet Flow

1994 ◽  
Vol 43 (4) ◽  
pp. 194-199 ◽  
Author(s):  
Hiroshi Nanjo ◽  
Norio Sanada ◽  
Kazuo Koike
Keyword(s):  
Aluminum Alloy ◽  
Jet Flow ◽  
Two Phase ◽  
Erosion Corrosion
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