Drop Penetration into Porous Powder Beds

多孔性 渗透(战争) 下降(电信) 材料科学 压力降 体积分数 复合材料 化学工程 机械 计算机科学 运筹学 电信 物理 工程类
作者
Karen Hapgood,James D. Litster,Simon Biggs,Tony Howes
出处
期刊:Journal of Colloid and Interface Science [Elsevier]
卷期号:253 (2): 353-366 被引量:233
标识
DOI:10.1006/jcis.2002.8527
摘要

The kinetics of drop penetration were studied by filming single drops of several different fluids (water, PEG200, PEG600, and HPC solutions) as they penetrated into loosely packed beds of glass ballotini, lactose, zinc oxide, and titanium dioxide powders. Measured times ranged from 0.45 to 126 s and depended on the powder particle size, viscosity, surface tensions, and contact angle. The experimental drop penetration times were compared to existing theoretical predictions by M. Denesuk et al. (J. Colloid Interface Sci.158, 114, 1993) and S. Middleman (“Modeling Axisymmetric Flows: Dynamics of Films, Jets, and Drops,” Academic Press, San Diego, 1995) but did not agree. Loosely packed powder beds tend to have a heterogeneous bed structure containing large macrovoids which do not participate in liquid flow but are included implicitly in the existing approach to estimating powder pore size. A new two-phase model was proposed where the total volume of the macrovoids was assumed to be the difference between the bed porosity and the tap porosity. A new parameter, the effective porosity εeff, was defined as the tap porosity multiplied by the fraction of pores that terminate at a macrovoid and are effectively blocked pores. The improved drop penetration model was much more successful at estimating the drop penetration time on all powders and the predicted times were generally within an order of magnitude of the experimental results.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
Whassupww完成签到,获得积分10
刚刚
云梦发布了新的文献求助10
1秒前
葶ting完成签到 ,获得积分10
2秒前
乔介一完成签到 ,获得积分10
3秒前
明理萃完成签到 ,获得积分10
4秒前
5秒前
研友_VZG7GZ应助温柔的斩采纳,获得10
6秒前
6秒前
GreenDuane完成签到 ,获得积分0
7秒前
心想事成的太阳花完成签到,获得积分10
7秒前
上官若男应助加油嘎嘎嘎采纳,获得10
8秒前
唐僧肉臊子面完成签到,获得积分10
9秒前
末晶发布了新的文献求助10
10秒前
asd00完成签到 ,获得积分10
11秒前
丘比特应助南国采纳,获得10
12秒前
12秒前
juzi完成签到 ,获得积分10
12秒前
搜集达人应助Th采纳,获得10
12秒前
碧蓝丹烟发布了新的文献求助10
12秒前
都是发布了新的文献求助10
13秒前
14秒前
罗实完成签到 ,获得积分10
14秒前
14秒前
15秒前
bkagyin应助sekidesu采纳,获得30
16秒前
夏夜完成签到 ,获得积分10
17秒前
叶远望完成签到 ,获得积分10
17秒前
Jxnx完成签到 ,获得积分20
17秒前
19秒前
ee关闭了ee文献求助
19秒前
an12138完成签到,获得积分10
19秒前
boboking完成签到,获得积分10
19秒前
19秒前
五十一完成签到 ,获得积分10
20秒前
支妙完成签到,获得积分10
20秒前
Oyster7应助Yy1331采纳,获得10
20秒前
xiamqw发布了新的文献求助50
22秒前
扶光完成签到 ,获得积分10
22秒前
23秒前
23秒前
高分求助中
Continuum Thermodynamics and Material Modelling 3000
Production Logging: Theoretical and Interpretive Elements 2700
Mechanistic Modeling of Gas-Liquid Two-Phase Flow in Pipes 2500
Structural Load Modelling and Combination for Performance and Safety Evaluation 1000
Conference Record, IAS Annual Meeting 1977 720
電気学会論文誌D(産業応用部門誌), 141 巻, 11 号 510
Typology of Conditional Constructions 500
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3567203
求助须知:如何正确求助?哪些是违规求助? 3139723
关于积分的说明 9433132
捐赠科研通 2840473
什么是DOI,文献DOI怎么找? 1561079
邀请新用户注册赠送积分活动 730189
科研通“疑难数据库(出版商)”最低求助积分说明 717869