https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:16700 Wed 11 Apr 2018 14:32:02 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:13854 Wed 11 Apr 2018 14:07:42 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24891 -3. The materials used were poly(methyl methacrylate) (PMMA), glass, and anatase. The interaction of the bubbles, once brought into contact, was monitored using high-speed video recording. Visual inspection indicated that denser particles were more easily displaced during the contact of the bubbles and therefore the PMMA particles provided a particle barrier more resistant to coalescence. The coalescence events yielded information on the surface properties of the bubble and the detachment of particles. The attached particles commonly dampen the oscillation of the coalesced bubbles through viscous drag and change in the surface properties (e.g., area-exclusion principle). The dampening of the oscillation generally leads to a reduced mass of particles detaching from the bubble surface. It was found that the different materials investigated did not offer clear evidence of the effect of particle detachment on the bubble surface properties in the present systems. On the other hand, the detachment of different particle materials seemed to be consistent with one another when comparing the attachment and detachment forces exerted on the particles based on their density, size, and hydrophobicity. It was concluded that particles of lower density are more effective in stabilizing interfaces, and thus particle density is an important parameter in the selection of materials for the handling of dispersions.]]> Wed 11 Apr 2018 13:00:50 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30745 Wed 10 Nov 2021 15:13:20 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:732 Wed 01 Dec 2021 11:43:37 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36319 Tue 31 Mar 2020 08:48:19 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48002 Tue 14 Feb 2023 16:50:06 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50050 Thu 29 Jun 2023 15:20:49 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38304 Thu 26 Aug 2021 10:50:38 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49657 Thu 25 May 2023 16:15:45 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:470 Thu 25 Jul 2013 09:09:55 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1614 Sat 24 Mar 2018 08:30:33 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17574 Sat 24 Mar 2018 08:04:02 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19829 Sat 24 Mar 2018 07:56:58 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:21129 Sat 24 Mar 2018 07:53:54 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:21126 Sat 24 Mar 2018 07:53:54 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:87 Sat 24 Mar 2018 07:42:15 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26399 Sat 24 Mar 2018 07:28:00 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28104 Sat 24 Mar 2018 07:24:56 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:27713 -3 and 2.0x10^-5 N. The strength of the hydrophobic force between the particles in the second set and the bubble was then decreased by a maximum of 5 orders of magnitude with respect to the values in the first set. The results show that the total number of collected particles was larger for the top distribution than for the spherical one. This was due to the favouring action of gravity which pulled the particles towards the bubble in the former case and away from it in the latter case. In addition, in order to recover only particles from the first set while leaving the other particles in the bulk a reduction of the hydrophobic force strength of around 50 times was needed. It is intended that a further sophistication of this model by including fluid flow around the bubble would provide a useful tool to investigate the selective capture of particles in froth flotation.]]> Sat 24 Mar 2018 07:24:38 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3292 Sat 24 Mar 2018 07:22:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3296 Sat 24 Mar 2018 07:22:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3286 Sat 24 Mar 2018 07:22:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37747 Mon 08 Apr 2024 10:18:43 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:45801 Mon 07 Nov 2022 09:58:02 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38218 p ≤ 0.25) and bubble Reynolds numbers (50 ≤ Re_b ≤ 200). It was observed that the collision efficiency decreased with increasing the solid fraction until achieving a plateau value. This plateau was attributed to the increase in the lateral expansion of the swarm and particle velocities. The former effect decreased the collision by interception, while the latter increased the inertial effects. However, when the bubble Reynolds number increased, the particle swarm did not have enough time to accelerate or deform before reaching the bubble, and thus, the collision efficiency became insensitive to the solid fraction. The modelling approach presented provides a framework to manage the complexity of particle-bubble interactions in a multiple-particle system.]]> Fri 13 Aug 2021 15:34:48 AEST ]]>