https://trevorwalker.xyz/tags/rd/Recent content in R&D on Trevor WalkerHugo -- gohugo.ioenTue, 14 Apr 2020 00:00:00 +0000https://trevorwalker.xyz/project/arc-pfas-grant-1/Tue, 14 Apr 2020 00:00:00 +0000https://trevorwalker.xyz/project/arc-pfas-grant-1/Australian Research Council Special Research Initiatives Grant April 14, 2020 Plasma Bubble Column for one step remediation of PFAS. This project aims to develop a new class of plasma water treatment reactors by combining the effectiveness of atmospheric air plasma with the effective mixing of bubble columns. Non-thermal plasmas have been demonstrated to degrade PFAS at the laboratory scale, but key questions remain on the mechanisms of action and process scaling.https://trevorwalker.xyz/project/nier-vam-safety-project/Wed, 25 Oct 2017 00:00:00 +0000https://trevorwalker.xyz/project/nier-vam-safety-project/NIER VAM Abatement Safety Project October 25, 2017 A $27 million five-year research project to determine the critical science and engineering issues underpinning safe operation of Ventilation Air Methane (VAM) capture ducts, part of Large-Scale VAM abatement systems proposed by the Australian coal industry to address fugitive emissions. Embedded in the Newcastle Institute of Energy and Resources (NIER) research team I harmonised research, commercial and industrial objectives, ensuring successful project delivery for key stakeholders.https://trevorwalker.xyz/media/2019-09-24-arc-pfas-grant/Tue, 24 Sep 2019 00:00:00 +0000https://trevorwalker.xyz/media/2019-09-24-arc-pfas-grant/https://trevorwalker.xyz/publications/2013-08-30-the-use-of-primitives-in-the-calculation-of-radiative-view-factors/Fri, 30 Aug 2013 00:00:00 +0000https://trevorwalker.xyz/publications/2013-08-30-the-use-of-primitives-in-the-calculation-of-radiative-view-factors/Doctoral thesis “The use of primitives in the calculation of radiative view factors” which was accepted by the Faculty of Engineering and Information Technologies, School of Chemical and Biomolecular Engineering at the University of Sydney in August 2013. The complete thesis can be accessed directly here. Abstract Compilations of radiative view factors (often in closed analytical form) are readily available in the open literature for commonly encountered geometries. For more complex three-dimensional (3D) scenarios, however, the effort required to solve the requisite multi-dimensional integrations needed to estimate a required view factor can be daunting to say the least.https://trevorwalker.xyz/publications/2012-11-29-radiative-view-factors-using-ray-tracing/Thu, 29 Nov 2012 00:00:00 +0000https://trevorwalker.xyz/publications/2012-11-29-radiative-view-factors-using-ray-tracing/A peer-reviewed research paper published in Volume 4, Issue 5 of the international journal Computational Thermal Sciences. Abstract Drawing on ideas from computer-based graphical representations, the conventional use of finite element based approaches to represent three-dimensional (3D) geometries of interest is challenged in this work by the use of a modest suite of geometric “primitives” (i.e., generic shapes such as a sphere, a cone, a flat surface) that in combination via a set of affine transformations can provide a realistic approximation to almost any conceivable 3D body.https://trevorwalker.xyz/publications/2012-07-01-radiative-view-factors-using-ray-tracing-copy/Sun, 01 Jul 2012 00:00:00 +0000https://trevorwalker.xyz/publications/2012-07-01-radiative-view-factors-using-ray-tracing-copy/A peer reviewed paper presented at the Advances in Computational Heat Transfer international symposium in Bath, England. Abstract Drawing on ideas from computer-based graphical representations, the conventional use of finite element based approaches to represent three-dimensional (3D) geometries of interest is challenged in this work by the use of a modest suite of geometric ‘primitives’ (i.e. generic shapes such as a sphere, a cone, a flat surface) that in combination via a set of affine transformations can provide a realistic approximation to almost any conceivable 3D body.https://trevorwalker.xyz/publications/2010-09-26-chemeca-numerical-determination-of-radiative-view-factors/Sun, 26 Sep 2010 00:00:00 +0000https://trevorwalker.xyz/publications/2010-09-26-chemeca-numerical-determination-of-radiative-view-factors/A peer-reviewed research paper presented at Chemeca 2010 in Adelaide, 2010. Chemeca is an annual conference established in 1970 to bring together chemical engineers and scientists from Australia and New Zealand to share insights and advanced centred around an annual theme. The theme of Chemeca 2010 was ‘Engineering at the Edge’. Abstract The accurate determination of view factors can be critically important in modelling any process where radiation is a major heat transfer mode.https://trevorwalker.xyz/publications/2010-07-01-radiative-view-factors-using-ray-tracing/Thu, 01 Jul 2010 00:00:00 +0000https://trevorwalker.xyz/publications/2010-07-01-radiative-view-factors-using-ray-tracing/A peer-reviewed research paper published in Volume 132, Issue 7 of the ASME Journal of Heat Transfer. Abstract A ray-tracing method is presented for numerically determining radiative view factors in complex three-dimensional geometries. This method uses a set of “primitive” shapes to approximate the required geometry together with a Monte Carlo simulation to track the fate of randomized rays leaving each surface. View factors were calculated for an operational fiber drawing furnace using both numerical integration and ray-tracing methods.https://trevorwalker.xyz/publications/2009-01-01-indicative-assessment-of-no-au-phytomining/Thu, 01 Jan 2009 00:00:00 +0000https://trevorwalker.xyz/publications/2009-01-01-indicative-assessment-of-no-au-phytomining/A peer-reviewed research paper published in Volume 17, Issue 2 of the Journal of Cleaner Production, an international, transdisciplinary journal focusing on Cleaner Production, Environmental, and Sustainability research and practice. Abstract Phytomining involves the extraction of metals from solid and liquid substrates using specially selected hyperaccumulating plants. Phytomining is commercially motivated, the objective being to produce a viable metal yield, at production costs low enough to compete with traditional mining techniques, e.