Fountain flow revisited: The effect of various fluid mechanics parameters

Mitsoulis, E

dc.contributor.author	Mitsoulis, E	en
dc.date.accessioned	2014-03-01T01:33:30Z
dc.date.available	2014-03-01T01:33:30Z
dc.date.issued	2010	en
dc.identifier.issn	0001-1541	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20455
dc.subject	Compressibility	en
dc.subject	Exit correction	en
dc.subject	Fountain flow	en
dc.subject	Gravity	en
dc.subject	Inertia	en
dc.subject	Injection molding	en
dc.subject	Newtonian fluid	en
dc.subject	Pressure-dependence of viscosity	en
dc.subject	Surface tension	en
dc.subject	Wall slip	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Exit correction	en
dc.subject.other	Fountain flow	en
dc.subject.other	Gravity	en
dc.subject.other	Inertia	en
dc.subject.other	Newtonian fluid	en
dc.subject.other	Newtonian fluids	en
dc.subject.other	Wall slip	en
dc.subject.other	Compressibility	en
dc.subject.other	Computer simulation	en
dc.subject.other	Contacts (fluid mechanics)	en
dc.subject.other	Finite element method	en
dc.subject.other	Fluid mechanics	en
dc.subject.other	Fluids	en
dc.subject.other	Fountains	en
dc.subject.other	Injection molding	en
dc.subject.other	Molds	en
dc.subject.other	Surface chemistry	en
dc.subject.other	Surface properties	en
dc.subject.other	Surface tension	en
dc.subject.other	Viscosity	en
dc.subject.other	Wetting	en
dc.subject.other	Pressure effects	en
dc.title	Fountain flow revisited: The effect of various fluid mechanics parameters	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/aic.12038	en
heal.identifier.secondary	http://dx.doi.org/10.1002/aic.12038	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Numerical simulations have been undertaken for the benchmark problem of fountain flow present in injection-mold filling. The finite element method (FEM) is used to provide numerical results for both cases of planar and axisymmetric domains under laminar, isothermal, steady-state conditions for Newtonian fluids. The effects of inertia, gravity, surface tension, compressibility, slip at the wall, and pressure dependence of the viscosity are all considered individually in parametric studies covering a wide range of the relevant parameters. These results extend previous ones regarding the shape of the front, and in particular the centerline front position, as a function of the dimensionless parameters. The pressures from the simulations have been used to compute the excess pressure losses in the system (front pressure correction or exit correction). Inertia leads to highly extended front positions relative to the inertialess Newtonian values, which are 0.895 for the planar case and 0.835 for the axisymmetric one. Gravity acting in the direction of flow shows the same effect, while gravity opposing the flow gives a reduced bulge of the fountain. Surface tension, slip at the wall, and compressibility, all decrease the shape of the front. Pressure-dependence of the viscosity leads to increased front position as a corresponding dimensionless parameter goes from zero (no effect) to higher values of the pressure-shift factor. The exit correction increases monotonically with inertia, compressibility, and gravity, while it decreases monotonically with slip and pressure-dependence of the viscosity. Contour plots of the primary variables (velocity-pressure) show interesting trends compared with the base case (zero values of the dimensionless parameters and of surface tension). (C) 2009 American Institute of Chemical Engineers AIChE J, 56: 1147-1162, 2010	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	AIChE Journal	en
dc.identifier.doi	10.1002/aic.12038	en
dc.identifier.isi	ISI:000276979300004	en
dc.identifier.volume	56	en
dc.identifier.issue	5	en
dc.identifier.spage	1147	en
dc.identifier.epage	1162	en