000			03827ntm a2200361 i 4500
999			_c96762 _d96768
003			MY-KuUP
005			20251125110018.0
006			a||||fr|||| 000 0
008			220223s2020 my a|||fr|||| 000 0 eng d
020			_aTHE0009121(Local) _qhardback
040			_aUMP _beng _cUMP _erda
090			_aFTKPM .N37 2020 r Thesis
100	1		_aNaqib Hakim Kamarudin, _eauthor.
245	1	0	_aComputational fluid dynamic simulation of abrasive waterjet nozzle erosion / _cNaqib Hakim Kamarudin
264		1	_aKuantan, Pahang : _bUMP, _c2020
264		4	_c© 2020
300			_axii, 106 pages : _billustrations (some color) ; _c30 cm. + _e1 CD ROM
336			_atext _2rdacontent
336			_atext _2rdacontent
337			_aunmediated _2rdamedia
337			_acomputer _2rdamedia
338			_avolume _2rdacarrier
338			_acomputer disc _2rdacarrier
347			_atext file _bPDF _2rda
500			_aFaculty of Manufacturing and Mechatronic Engineering Technology
502			_aThesis (Master of Science) -- Universiti Malaysia Pahang – 2020
504			_aIncludes bibliographical references
520	3		_aThe nozzle of the Abrasive Waterjet (AWJ) machine is the most critical component that consequently affects the overall cutting quality, precision, performance and economy. Exposure to slurry of high velocity of water and abrasives makes it susceptible to wear erosion which requires for intermittent reinstatement. Previous simulation of AWJ nozzle erosion have been done by using a 2-D fluid flow model. However, it is important to conduct further simulation using a more accurate 3-D fluid flow model. The present work attempts to simulate the erosion of the nozzle wall using computational fluid dynamics-based software in 3-D. A suitable mesh assembly methods and turbulence model for the simulation of nozzle erosion was identified. Discrete Phase Method (DPM) model was used to simulate multiphase modelling of air, water and abrasives. The Finnie’s erosion and accretion model were selected to find the erosion rate. The erosion profile based on the simulation was compared with the actual profile of worn out nozzle. Furthermore, the nozzle erosion rate for different geometric parameters and working conditions were analyzed based on simulation and experimental results. It was found that the simulations using Quadrilateral and mesh converged well with an error of .645E-08to -1.591E08as compared to Cut-Cell and Tetrahedral mesh which produced some errors between 6.750E-07to -1.231E-08 and 1.868E-08to -6.462E-08, respectively. The Realizable K-ε turbulence model was selected as it shows less error of -3.266E-08to -1.592E-08as compared to Standard turbulence model which between -4.281E-08to -1.290E-08. Furthermore, it was found that the erosion profile with wavy patterns have correlated well past studies using 2-D model Overall, comparing the simulation results under different geometric parameters and operating conditions with empirical models obtained from past studies showed and error in the range of 6.022E-09kg/m2s-1to 1.063E-07 kg/m2s-1. Also, there seems to be consistency in the erosion trend for different simulated parameters with experimental results although the erosion rates appeared to be mostly smaller in values. I can be concluded that the present work has shown an excellent potential for predicting the life of abrasive waterjet nozzle for industrial application.
610	2	0	_aFaculty of Manufacturing and Mechatronic Engineering Technology _xDissertations
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses
942			_2lcc _cTHESIS