Neil Kelson | Queensland University of Technology (original) (raw)

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Papers by Neil Kelson

Research paper thumbnail of Natural convection in rectangular cavities at high Rayleigh number

Natural convection in rectangular two-dimensional cavities with differentially heated side walls ... more Natural convection in rectangular two-dimensional cavities with differentially heated side walls is a standard problem in numerical heat transfer. Most of the existing studies has considered the low Ra laminar regime. The general thrust of the present research is to investigate higher Ra flows extending into the unsteady and turbulent regimes where the physics is not fully understood and appropriate models for turbulence are not yet established. In the present study the Boussinesq approximation is being used, but the theoretical background and some preliminary results have been obtained[1] for flows with variable properties.

Research paper thumbnail of An Efficient Algorithm for the Detection of Eden

Research paper thumbnail of Flow field and traverse times for fan forced injection of fumigant via circular or annular inlet into stored grain

Applied Mathematical Modelling, 2016

Research paper thumbnail of Flow of a micropolar fluid bounded by a stretching sheet

Research paper thumbnail of Visualisation of complex flows using texture-based techniques

Research paper thumbnail of Blood flow in a double output centrifugal artificial heart pump as a biventricular assist device

Research paper thumbnail of Pulse-coupled neural network performance for real-time identification of vegetation during forced landing

Research paper thumbnail of Simulation of phosphine flow in vertical grain storage: a preliminary numerical study

Research paper thumbnail of Solutions for the flow of a micropolar fluid in a porous channel

Research paper thumbnail of Solving tri-diagonal linear systems using field programmable gate arrays

In this paper, we present the outcomes of a project on the exploration of the use of Field Progra... more In this paper, we present the outcomes of a project on the exploration of the use of Field Programmable Gate Arrays(FPGAs) as co-processors for scientific computation. We designed a custom circuit for the pipelined solving of multiple tri-diagonal linear systems. The design is well suited for applications that require many independent tri diagonal system solves, such as finite difference methods for solving PDEs or applications utilising cubic spline interpolation. The selected solver algorithm was the Tri Diagonal Matrix Algorithm (TDMA or Thomas Algorithm). Our solver supports user specified precision thought the use of a custom floating point VHDL library supporting addition, subtraction, multiplication and division. The variable precision TDMA solver was tested for correctness in simulation mode. The TDMA pipeline was tested successfully in hardware using a simplified solver model. The details of implementation, the limitations, and future work are also discussed.

Research paper thumbnail of Computation of ECG Signal Features Using MCMC Modelling in Software and FPGA Reconfigurable Hardware

Procedia Computer Science, 2014

Research paper thumbnail of Experiences with implementing common mathematical operations using field programmable gate arrays

Research paper thumbnail of Hardware design and implementation of a MAVLink interface for an FPGA-based autonomous UAV flight control system

Research paper thumbnail of Investigating the flow field of a Stormwater Quality Improvement Device

Research paper thumbnail of Computational Fluid Dynamic Analysis of Intracranial Aneurysmal Bleb Formation

Neurosurgery, 2013

BACKGROUND: The management of unruptured aneurysms is controversial, with the decision to treat i... more BACKGROUND: The management of unruptured aneurysms is controversial, with the decision to treat influenced by aneurysm characteristics including size and morphology. Aneurysmal bleb formation is thought to be associated with an increased risk of rupture. OBJECTIVE: To correlate computational fluid dynamic (CFD) indices with bleb formation. METHODS: Anatomic models were constructed from 3-dimensional rotational angiography data in 27 patients with cerebral aneurysms harboring a single bleb. Additional models representing the aneurysm before bleb formation were constructed by digitally removing the bleb. We characterized hemodynamic features of models both with and without the blebs using CFDs. Flow structure, wall shear stress (WSS), pressure, and oscillatory shear index (OSI) were analyzed. RESULTS: There was a statistically significant association between bleb location at or adjacent to the point of maximal WSS (74%, P = .019), irrespective of rupture status. Aneurysmal blebs were ...

Research paper thumbnail of Calculation of Engine Parameters Using Reconfigurable Hardware

International Journal of Computational Methods, 2014

The feasibility of real-time calculation of parameters for an internal combustion engine via reco... more The feasibility of real-time calculation of parameters for an internal combustion engine via reconfigurable hardware implementation is investigated as an alternative to software computation. A detailed in-hardware field programmable gate array (FPGA)-based design is developed and evaluated using input crank angle and in-cylinder pressure data from fully instrumented diesel engines in the QUT Biofuel Engine Research Facility (BERF). Results indicate the feasibility of employing a hardware-based implementation for real-time processing for speeds comparable to the data sampling rate currently used in the facility, with acceptably low level of discrepancies between hardware and software-based calculation of key engine parameters.

Research paper thumbnail of FPGA Implementation of an Evolutionary Algorithm for Autonomous Unmanned Aerial Vehicle On-Board Path Planning

IEEE Transactions on Evolutionary Computation, 2013

Research paper thumbnail of Computational experiments involving population size for FPGA-based implementation of a GA for the TSP

Research paper thumbnail of An FPGA-based approach to multi-objective evolutionary algorithm for multi-disciplinary design optimisation

Research paper thumbnail of Modelling ideal turbulent vortex breakdown

Research paper thumbnail of Natural convection in rectangular cavities at high Rayleigh number

Natural convection in rectangular two-dimensional cavities with differentially heated side walls ... more Natural convection in rectangular two-dimensional cavities with differentially heated side walls is a standard problem in numerical heat transfer. Most of the existing studies has considered the low Ra laminar regime. The general thrust of the present research is to investigate higher Ra flows extending into the unsteady and turbulent regimes where the physics is not fully understood and appropriate models for turbulence are not yet established. In the present study the Boussinesq approximation is being used, but the theoretical background and some preliminary results have been obtained[1] for flows with variable properties.

Research paper thumbnail of An Efficient Algorithm for the Detection of Eden

Research paper thumbnail of Flow field and traverse times for fan forced injection of fumigant via circular or annular inlet into stored grain

Applied Mathematical Modelling, 2016

Research paper thumbnail of Flow of a micropolar fluid bounded by a stretching sheet

Research paper thumbnail of Visualisation of complex flows using texture-based techniques

Research paper thumbnail of Blood flow in a double output centrifugal artificial heart pump as a biventricular assist device

Research paper thumbnail of Pulse-coupled neural network performance for real-time identification of vegetation during forced landing

Research paper thumbnail of Simulation of phosphine flow in vertical grain storage: a preliminary numerical study

Research paper thumbnail of Solutions for the flow of a micropolar fluid in a porous channel

Research paper thumbnail of Solving tri-diagonal linear systems using field programmable gate arrays

In this paper, we present the outcomes of a project on the exploration of the use of Field Progra... more In this paper, we present the outcomes of a project on the exploration of the use of Field Programmable Gate Arrays(FPGAs) as co-processors for scientific computation. We designed a custom circuit for the pipelined solving of multiple tri-diagonal linear systems. The design is well suited for applications that require many independent tri diagonal system solves, such as finite difference methods for solving PDEs or applications utilising cubic spline interpolation. The selected solver algorithm was the Tri Diagonal Matrix Algorithm (TDMA or Thomas Algorithm). Our solver supports user specified precision thought the use of a custom floating point VHDL library supporting addition, subtraction, multiplication and division. The variable precision TDMA solver was tested for correctness in simulation mode. The TDMA pipeline was tested successfully in hardware using a simplified solver model. The details of implementation, the limitations, and future work are also discussed.

Research paper thumbnail of Computation of ECG Signal Features Using MCMC Modelling in Software and FPGA Reconfigurable Hardware

Procedia Computer Science, 2014

Research paper thumbnail of Experiences with implementing common mathematical operations using field programmable gate arrays

Research paper thumbnail of Hardware design and implementation of a MAVLink interface for an FPGA-based autonomous UAV flight control system

Research paper thumbnail of Investigating the flow field of a Stormwater Quality Improvement Device

Research paper thumbnail of Computational Fluid Dynamic Analysis of Intracranial Aneurysmal Bleb Formation

Neurosurgery, 2013

BACKGROUND: The management of unruptured aneurysms is controversial, with the decision to treat i... more BACKGROUND: The management of unruptured aneurysms is controversial, with the decision to treat influenced by aneurysm characteristics including size and morphology. Aneurysmal bleb formation is thought to be associated with an increased risk of rupture. OBJECTIVE: To correlate computational fluid dynamic (CFD) indices with bleb formation. METHODS: Anatomic models were constructed from 3-dimensional rotational angiography data in 27 patients with cerebral aneurysms harboring a single bleb. Additional models representing the aneurysm before bleb formation were constructed by digitally removing the bleb. We characterized hemodynamic features of models both with and without the blebs using CFDs. Flow structure, wall shear stress (WSS), pressure, and oscillatory shear index (OSI) were analyzed. RESULTS: There was a statistically significant association between bleb location at or adjacent to the point of maximal WSS (74%, P = .019), irrespective of rupture status. Aneurysmal blebs were ...

Research paper thumbnail of Calculation of Engine Parameters Using Reconfigurable Hardware

International Journal of Computational Methods, 2014

The feasibility of real-time calculation of parameters for an internal combustion engine via reco... more The feasibility of real-time calculation of parameters for an internal combustion engine via reconfigurable hardware implementation is investigated as an alternative to software computation. A detailed in-hardware field programmable gate array (FPGA)-based design is developed and evaluated using input crank angle and in-cylinder pressure data from fully instrumented diesel engines in the QUT Biofuel Engine Research Facility (BERF). Results indicate the feasibility of employing a hardware-based implementation for real-time processing for speeds comparable to the data sampling rate currently used in the facility, with acceptably low level of discrepancies between hardware and software-based calculation of key engine parameters.

Research paper thumbnail of FPGA Implementation of an Evolutionary Algorithm for Autonomous Unmanned Aerial Vehicle On-Board Path Planning

IEEE Transactions on Evolutionary Computation, 2013

Research paper thumbnail of Computational experiments involving population size for FPGA-based implementation of a GA for the TSP

Research paper thumbnail of An FPGA-based approach to multi-objective evolutionary algorithm for multi-disciplinary design optimisation

Research paper thumbnail of Modelling ideal turbulent vortex breakdown

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