https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:13361 Wed 11 Apr 2018 16:36:47 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30478 Wed 11 Apr 2018 15:55:24 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31095 Wed 11 Apr 2018 12:32:43 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:12370 Wed 11 Apr 2018 11:10:22 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33620 Wed 04 Sep 2019 12:16:44 AEST ]]> 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:37762 Tue 13 Apr 2021 15:13:52 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40098 Tue 05 Jul 2022 10:34:35 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33677 Tue 04 Dec 2018 16:13:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33371 Tue 03 Sep 2019 18:26:59 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:184 Thu 25 Jul 2013 09:09:30 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24590 Eo (=ΔρgD²/σ)≤641 and Re≤151. Additionally, results published in the literature encompassing bubbles with lower values of Eo numbers were also considered, such that the overall dependencies of bubble shape, wake characteristics, and drag coefficient over a large range of Eo and Re values can be identified. While it was found that the deformation of the bubbles as predicted through the numerical study can generally replicate experimental observations presented, several limitations were identified, such as in the representation of skirt formation behind a skirted bubble and the formation of satellite bubbles behind a bubble rising at high Reynolds numbers. The dependency of the bubble aspect ratio on the Weber and Morton numbers was confirmed for cases of spherical and ellipsoidal bubbles; whilst for spherical cap and skirted bubbles the aspect ratio was found to depend largely on the Reynolds and Capillary numbers, respectively. Finally, the expansion and formation of closed/open laminar wakes behind the rising bubble were analysed and was found to correlate well with the bubble Re and Eo numbers.]]> Thu 21 Oct 2021 12:53:06 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49462 Thu 18 May 2023 12:54:11 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32957 -5 to 5 × 10^-4 m2 s^-1 when energy dissipation rate increased from ~ 0.005-0.01 m² s^-3. Different dispersion correlations were then utilized to describe the intermixing and segregation behaviour for the binary particle species differing in density in terms of axial particle concentration profile using a one-dimensional convection-diffusion model which agreed well with the experimental data. Additionally, a two-dimensional (2D) Eulerian-Eulerian (E-E) model based on kinetic theory of granular flow (KTGF) was used to simulate axial variation of the binary solids concentration which showed good agreement (~ 10% deviation) with the published experimental data. Axial profile of dispersion coefficient predicted by the various correlations exhibited a sharp variation in the intermixing zone formed in between the lower (higher density) and upper particle bed (low density). In this region, CFD model predicted energy dissipation rate increased significantly with liquid superficial velocity which reflected strong phase interactions in the intermixing zone.]]> Thu 16 Aug 2018 13:36:10 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:22503 Thu 10 Sep 2020 15:22:49 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54645 Thu 07 Mar 2024 14:57:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:8904 Sat 24 Mar 2018 08:36:45 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:8905 Sat 24 Mar 2018 08:36:45 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1602 Sat 24 Mar 2018 08:30:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1403 Sat 24 Mar 2018 08:28:17 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:10451 Sat 24 Mar 2018 08:08:03 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19911 Sat 24 Mar 2018 08:03:45 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20522 Sat 24 Mar 2018 08:02:34 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20753 Sat 24 Mar 2018 08:00:25 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17741 Sat 24 Mar 2018 07:57:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20032 Sat 24 Mar 2018 07:50:56 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28145 Sat 24 Mar 2018 07:36:36 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:27529 Sat 24 Mar 2018 07:28:57 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26046 Sat 24 Mar 2018 07:26:26 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26549 Sat 24 Mar 2018 07:26:08 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25528 -3) were used as fluidised particles. Three different combinations of particle size pairs of both equal and unequal mass ratios were used using a constant liquid (water) superficial velocity of 0.17 ms^-1 in all the cases. Numerically, a two dimensional Eulerian-Eulerian (E-E) CFD model incorporating kinetic theory of granular flow (KTGF) was developed to predict the bed expansion behaviour. It was observed that complete bed segregation occurred when the difference between the solid particle diameters was higher while lower difference in particle diameters led to partial bed segregation. The CFD model also predicted these behaviours which were in good agreement with the experimental data.]]> Sat 24 Mar 2018 07:26:07 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25529 -3 were fluidised in water. Binary experiments were carried out considering both equal and unequal solid mass ratios ranging from 0.16 to 6.0. The overall bed expansions including segregated and intermixed zones were monitored. The effect of loading pattern on bed expansion was found insignificant in a binary SLFB. In a completely segregated SLFB, bottom mono-component layer displayed a negative deviation up to 30% whereas a positive deviation up to 22% was found in top mono-component layer when compared to respective individual monocomponent SLFBs. The total bed height of binary mixture was found to be unequal to sum of expanded bed height in individual mono-component SLFB, showing either positive or negative deviations. The experimentally observed criterion of the bed independency has been tabulated. Eulerian-Eulerian (E-E) CFD simulations with kinetic theory of granular flow (KTGF) have been performed and compared with the experimental data. The CFD predictions were found to be in good agreement (within ±6 per cent deviation) when compared to experimental results.]]> Sat 24 Mar 2018 07:26:07 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30914 Sat 24 Mar 2018 07:25:36 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:23747 Sat 24 Mar 2018 07:16:57 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24063 Sat 24 Mar 2018 07:09:41 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32956 -3) spherical glass beads particles of diameter 3, 5 and 8 mm and water as fluidising medium with different particle mass ratios varying from 0.17 to 6.0. In the expanded bed, both segregated and intermixed zones were observed depending on the different particle diameter combinations. In a completely segregated SLFB, the bottom monosized layer exhibited a negative deviation ~23% whereas a positive deviation ~25% was found in the top monosized layer when compared with the corresponding pure monosized system. A small mixing zone spanning approximately two particle diameters thick was observed to exist even in a completely segregated SLFB for higher diameter ratio cases. A slight decrease in the mixing zone height was noted with increasing liquid superficial velocity. For lower diameter ratio cases, a relatively lager mixing zone height was observed which increased with increasing liquid superficial velocity. The bed expansion ratio was noted to decrease with increasing solid mass ratio however it increased with increase in the fluidising velocity ratio following a reasonable power law trend. The expanded bed height of the binary mixture was not entirely additive of its corresponding mono-component bed heights and both positive and negative deviations were observed. Finally, a two-dimensional (2D) Eulerian-Eulerian (E-E) model incorporating the kinetic theory of granular flow (KTGF) was used to quantify the binary system hydrodynamics. The model predicted expanded bed height agreed with experimental measurements within ±6% deviation. Presence of a mixing zone was also confirmed by the CFD model and simulated particle phase volume fraction distribution qualitatively agreed with the experimental visualisations.]]> Sat 06 Jul 2024 14:56:03 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33149 Mon 23 Sep 2019 12:50:01 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39744 Fri 17 Jun 2022 18:27:07 AEST ]]>