Research on reducing erosion by adding ribs on the wall in particulate two-phase flows

Song, Xiaolei; Lin, Jianzhong; Zhao, Jing; Shen, Tao

doi:10.1016/0043-1648(96)80017-2

Cited by 39 publications

(13 citation statements)

References 3 publications

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“…tion. Song et al 1996 have demonstrated that a ribbed straight pipe would reduce erosion. The ribbed bend reduces erosion by changing the pattern of particle movement, altering the impingement angle, and reducing impact velocity.…”

Section: Methods For Erosion Protectionmentioning

confidence: 99%

Antierosion in a 90° bend by particle impaction

Fan

Cen

2002

AIChE Journal

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Section: Methods For Erosion Protectionmentioning

confidence: 99%

Antierosion in a 90° bend by particle impaction

Fan

Cen

2002

AIChE Journal

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“…Figure 5(a) shows the volume concentration ratio at bend inlet and outlet under two Dean numbers. This phenomenon is caused by the inertial impaction between large particle and bend wall during deposition and rebounding process [7]. To better describe the particle response to turbulent airflow, the Stokes number is defined as St = τ p u a /(D h /2), where u a is the air velocity, τ p is the particle relaxation time, and D h is the hydraulic diameter of the duct.…”

Section: Resultsmentioning

confidence: 99%

Experimental study of aerosol distribution and concentration variation through curved ducts

Sun

Jiang

2012

THERM SCI

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This paper presents an experimental investigation of an aerosol problem by adopting two methods. One approach utilizes scanning electron microscope to study the realistic aerosol deposition status in a typical duct bend. Through scanning electron microscope images and on-site observation, the aerosols tend to deposit and accumulate more on the outer bend wall and bend outlet wall. The other approach is to design systematic experiments to measure aerosol concentration variation and distribution through 90-degree curved ducts. This experimental method is simple for realistic applications. Measured results show that the average particle volume concentration diverges greatly after flowing through the bend. The loading ability decreases significantly for larger particles at bend outlet under higher Dean number

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“…However, in previous literature, no detailed discussion and investigation with regards to particle shape were conducted. Therefore, to better understand the effect of particle shape on particle movement such as particle-wall interaction (Song et al, 1996), deposition, distribution and nanoparticle flow (Tham et al, 2012, Yu et al, 2012, studies of modeling and simulation are needed. Notwithstanding, there are several previous research about the nonspherical particles conducted in the field of fluid dynamics by Lin et al (2003aLin et al ( , 2004.…”

Section: Introductionmentioning

confidence: 99%

Analysis of orientation and tensor properties of airborne fibrous particle flow

Sun

Jiang

2014

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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Purpose -The purpose of this paper is to study the effect of particle shapes (spherical particle and nonspherical fiber) on their orientation distributions in indoor environment. Design/methodology/approach -This paper adopted a particle model to predict the fibrous particle flow and distribution, and analyzed the orientation distributions of nonspherical fiber particles and spherical particles in airflows like indoor places. Fokker-Planck model was employed to solve the orientation behavior of nonspherical fiber particles. Findings -The simulation results discover that the nonspherical airborne fiber particles have very different characteristics and behaviors and their orientation distributions are totally different from the uniform distribution of spherical particles. The investigation of the particle orientation tensor and orientation strength indicates that the airflow field becomes more anisotropic due to the suspended fibers. The airborne fiber particles increase the viscosity of the room airflow due to the fiber induced additional viscosity. Originality/value -Orientation tensor, strength and additional viscosity in fibrous flow are seldom investigated indoor. This research reveals that the particle shape has to be considered in the analysis of particle transport and distribution in indoor places as most suspended indoor particles are nonspherical.

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Research on reducing erosion by adding ribs on the wall in particulate two-phase flows

Cited by 39 publications

References 3 publications

Antierosion in a 90° bend by particle impaction

Antierosion in a 90° bend by particle impaction

Experimental study of aerosol distribution and concentration variation through curved ducts

Analysis of orientation and tensor properties of airborne fibrous particle flow

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