Please use this identifier to cite or link to this item:
|Title:||Experimental study of liquid drop impact onto a powder surface|
|Source:||Marston, J.O., Thoroddsen, S.T., Ng, W.K., Tan, R.B.H. (2010-11). Experimental study of liquid drop impact onto a powder surface. Powder Technology 203 (2) : 223-236. ScholarBank@NUS Repository. https://doi.org/10.1016/j.powtec.2010.05.012|
|Abstract:||The initial dynamics of liquid drop impact onto powder surfaces is studied experimentally using high-speed photography. For a range of bed packing fractions, φ, liquid physical properties and impact velocities, ui, we observe a variety of phenomena that can be representative of a hydrophobic surface, a rough surface or a porous medium. The solids packing fraction in the bed, 0.38≤φ≤0.65, and the impact Weber number, 3.5≤We=ρDui 2/φ≤750, (where ρ, D and φ are the drop density, diameter and surface tension respectively) are shown to be the critical parameters governing the outcome of an impact. For high packing fractions, φ≳0.5, we show that the observed spreading, rebound and splashing can be broadly characterised in terms of the Weber number while for looser packing fractions, φ≲0.5, we observe powder ejectas and provide a qualitative description of the granule nucleation at the centre of the impact sites. © 2010 Elsevier B.V.|
|Source Title:||Powder Technology|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 21, 2018
WEB OF SCIENCETM
checked on Jan 15, 2018
checked on Feb 25, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.