Continuum prediction of entrainment rates and agglomeration of gas-fluidized, lightly-cohesive particles

Continuum prediction of entrainment rates and agglomeration of gas-fluidized, lightly-cohesive particles
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气体流化、低粘性颗粒的夹带率和团聚的连续预测

DOI:
10.1016/j.ces.2019.01.012
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发表时间:
2019
影响因子:
4.7
通讯作者:
Hrenya, Christine M.
Hrenya, Christine M.
中科院分区:
工程技术2区
文献类型:
--
作者:
Kellogg, Kevin M.;Liu, Peiyuan;Hrenya, Christine M.

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在这项工作中,最近开发的粘性颗粒连续介质理论(Kellogg等人,2017)应用于无界气固立管中的轻度粘性颗粒。这一最新理论的新颖之处在于它从根本上结合了颗粒温度(即冲击速度的连续测量)以及材料和凝聚特性对团块聚集和破碎率的影响。在这里,我们将这一理论扩展到多相系统,并特别强调其预测夹带速率的能力,因为当应用于同一系统时,过去的经验相关性会以数量级变化(Chew et al., 2015)。具体而言,将夹带速率和团聚分数的连续统预测与气固流动中轻粘性颗粒的离散元法(DEM)模拟进行了比较。这些量的一致性为连续统理论在气固流动中粘聚颗粒的应用提供了初步的验证。
In this work, a continuum theory for cohesive particles developed recently (Kellogg et al., 2017) is applied to lightly-cohesive particles in an unbounded, gas-solid riser. The novelty of this recent theory is its fundamental incorporation of the effects of the granular temperature (i.e., continuum measure of impact velocity) and the material and cohesion properties on the rates of aggregation and breakage of agglomerates. Here, we extend this theory to multiphase systems and place particular emphasis on its ability to predict entrainment rate, as past empirical correlations vary by orders of magnitude when applied to the same system (Chew et al., 2015). Specifically, continuum predictions of entrainment rates and agglomerate fraction are compared with Discrete Element Method (DEM) simulations of lightly-cohesive particles in a gas-solid flow. The agreement obtained for these quantities provides preliminary validation for the use of the continuum theory for cohesive particles in gas-solid flows.
DOI: 10.1002/aic.14307
发表时间: 2014-02-01
期刊: AICHE JOURNAL
影响因子: 3.7
作者:
Galvin, Janine E.;Benyahia, Sofiane
通讯作者: Benyahia, Sofiane
DOI: --
发表时间: 2009
期刊:
影响因子: --
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发表时间: 2015
期刊: Powder Technology
影响因子: 5.2
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DOI: 10.1017/jfm.2017.642
发表时间: 2017-12-10
影响因子: 3.7
作者:
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通讯作者: Hrenya, Christine M.