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Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration

A numerical study of Low Density Polyethylene (LDPE) melt on its phase changesbehaviour in mold cavity was carried out. The aim of the study was to observe andunderstand the behaviour of the flow of shear thinning fluids through mold cavity. Threedimensional model simulation of polymer rheology in a...

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Main Author: Milus, Mohd. Nur Fahmie Ikhwan
Format: Monograph
Language:English
Published: Universiti Sains Malaysia 2018
Subjects:
T Technology
TN Mining Engineering. Metallurgy
Online Access:http://eprints.usm.my/53177/1/Numerical%20Investigation%20Of%20Non-%20Newtonian%20Fluid%20During%20Mold%20Filling%20Process%20With%20Phase%20Change%20Consideration_Mohd.%20Nur%20Fahmie%20Ikhwan%20Milus_B1_2018.pdf
http://eprints.usm.my/53177/
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spelling my.usm.eprints.53177 http://eprints.usm.my/53177/ Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration Milus, Mohd. Nur Fahmie Ikhwan T Technology TN Mining Engineering. Metallurgy A numerical study of Low Density Polyethylene (LDPE) melt on its phase changesbehaviour in mold cavity was carried out. The aim of the study was to observe andunderstand the behaviour of the flow of shear thinning fluids through mold cavity. Threedimensional model simulation of polymer rheology in a dumbbell shape of mold cavitywas used. The ANSYS FLUENT 15.0 simulation software was used to demonstrateviscosity model (Cross Model). The effect of variation in process parameters such as mold temperature and cooling time on the rheological behaviour were studied. The mold temperature was found to have slightly influence on LDPE melt viscosity and flowin the mold cavity and also the phase changes or also known as “frozen skin” layer behaviour. The cooling time also gives the slightly effect on the crystallinity of LDPE in which cooling time plays a role as to determine the degree of crystallinity by giving a time for relaxation-orientation of molecular chains and align at tensile direction. This research was studied by several researchers but most of them did not do the experimental analysis as to compare with simulation results. The comparison between the simulation and experimental analysis must be made in order to determine the discrepancies between theoretical values and actual values and to strengthen the findings. A lot of parameters were considered in this study in order to determine the effect on phase changes and its contribution towards degree of crystallinity. The phase change behaviour was determined by comparing the maximum temperature of ejected specimen from mold in experimental and maximum temperature of specimen model after cooling time finished. Both simulation and experimental results are good and the theoretical and actual values does not show the significant different. Universiti Sains Malaysia 2018-06-01 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/53177/1/Numerical%20Investigation%20Of%20Non-%20Newtonian%20Fluid%20During%20Mold%20Filling%20Process%20With%20Phase%20Change%20Consideration_Mohd.%20Nur%20Fahmie%20Ikhwan%20Milus_B1_2018.pdf Milus, Mohd. Nur Fahmie Ikhwan (2018) Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral. (Submitted)
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T Technology
TN Mining Engineering. Metallurgy
spellingShingle T Technology
TN Mining Engineering. Metallurgy
Milus, Mohd. Nur Fahmie Ikhwan
Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration
description A numerical study of Low Density Polyethylene (LDPE) melt on its phase changesbehaviour in mold cavity was carried out. The aim of the study was to observe andunderstand the behaviour of the flow of shear thinning fluids through mold cavity. Threedimensional model simulation of polymer rheology in a dumbbell shape of mold cavitywas used. The ANSYS FLUENT 15.0 simulation software was used to demonstrateviscosity model (Cross Model). The effect of variation in process parameters such as mold temperature and cooling time on the rheological behaviour were studied. The mold temperature was found to have slightly influence on LDPE melt viscosity and flowin the mold cavity and also the phase changes or also known as “frozen skin” layer behaviour. The cooling time also gives the slightly effect on the crystallinity of LDPE in which cooling time plays a role as to determine the degree of crystallinity by giving a time for relaxation-orientation of molecular chains and align at tensile direction. This research was studied by several researchers but most of them did not do the experimental analysis as to compare with simulation results. The comparison between the simulation and experimental analysis must be made in order to determine the discrepancies between theoretical values and actual values and to strengthen the findings. A lot of parameters were considered in this study in order to determine the effect on phase changes and its contribution towards degree of crystallinity. The phase change behaviour was determined by comparing the maximum temperature of ejected specimen from mold in experimental and maximum temperature of specimen model after cooling time finished. Both simulation and experimental results are good and the theoretical and actual values does not show the significant different.
format Monograph
author Milus, Mohd. Nur Fahmie Ikhwan
author_facet Milus, Mohd. Nur Fahmie Ikhwan
author_sort Milus, Mohd. Nur Fahmie Ikhwan
title Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration
title_short Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration
title_full Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration
title_fullStr Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration
title_full_unstemmed Numerical Investigation Of Non- Newtonian Fluid During Mold Filling Process With Phase Change Consideration
title_sort numerical investigation of non- newtonian fluid during mold filling process with phase change consideration
publisher Universiti Sains Malaysia
publishDate 2018
url http://eprints.usm.my/53177/1/Numerical%20Investigation%20Of%20Non-%20Newtonian%20Fluid%20During%20Mold%20Filling%20Process%20With%20Phase%20Change%20Consideration_Mohd.%20Nur%20Fahmie%20Ikhwan%20Milus_B1_2018.pdf
http://eprints.usm.my/53177/
_version_ 1738511169086291968
score 13.211869

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