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Numerica. Simula.ion of a. a.gon Stirred La.le with Top a.d Bottom Injection

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Open Journa. of a.plied Sciences 2016年第13期6卷 860-867页

作者： Sofia.Torres miguel a. barron Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Mexico City Mexico

The stirring of a.molten steel la.le with a.gon injection through a.top submerged la.ce a.d a.bottom nozzle is numerica.ly studied here through Computa.iona. Fluid Dyna.ics (CFD) simula.ions. Three la.ce submergence depths a.d three injection velocities a.e considered in the CFD numerica. experiments. The turbulent dissipa.ion ra.e is employed to cha.a.terize the stirring phenomenon. The mixing times a.e determined from the ga. flow ra.e, la.le geometry a.d ba.h depth using a. empirica. correla.ion.

关键词： a.gon Injection CFD Simula.ions Ga. Stirring Mixing Time Molten Steel La.le Stirring Efficiency

Effect of the Density of Molten Meta. on the Ra.ning Phenomenon in Horizonta. Centrifuga. Ca.ting

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Open Journa. of a.plied Sciences 2024年第7期14卷 1918-1926页

作者： miguel a. barron Joa. Reyes Depa.ta.ento de Ma.eria.es Universida. a.tonoma.Metropolita.a.a.ca.otza.co Ciuda. de Mexico Mexico

In this work the influence of the density of the molten meta. on the emergence of the ra.ning phenomenon in the horizonta. centrifuga. ca.ting process is numerica.ly studied. Tra.sient 2D numerica. simula.ions were ca.ried out using Computa.iona. Fluid Dyna.ics softwa.e. Three molten meta.s with different density, na.ely a.uminum, iron a.d lea., a.d three a.gula. frequencies, na.ely 50, 66 a.d 77 ra./s were considered. It is found tha. the density of the molten meta. significa.tly a.fects the emergence, tra.sient or perma.ent, of the ra.n phenomenon. However, the ma.nitude a.d dura.ion of the ra.n phenomenon depend on the a.gula. frequency of the rota.ing mold. Likewise, since gra.ita.iona. forces a.fect the meta. a.cording to its density, the va.ue of the critica. rota.ion speed of the mold is a.so a.fected.

关键词： a.gula. Frequency Centrifuga. Force Computa.iona. Fluid Dyna.ics Critica. Rota.ion Speed G Fa.tor Horizonta. Centrifuga. Ca.ting Molten Meta. Density

Velocity Monitoring of Molten Steel in a.Continuous Ca.ting Mold Using Three Submerged Entry Nozzle Designs

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Modeling a.d Numerica. Simula.ion of Ma.eria. Science 2016年第4期6卷 59-68页

作者： Ra.l Mira.da.miguel a. barron Ca.los a. Herna.dez Depa.ta.ento de Electronica Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

The horizonta. a.d vertica. velocity components of molten steel in a.sla. continuous ca.ting mold produced by three different two-port Submerged Entry Nozzle (SEN) designs a.e monitored a.d compa.ed using Computa.iona. Fluid Dyna.ics (CFD) simula.ions. These two ports designs correspond to a.conventiona. cylindrica. SEN, a.pla.e SEN a.d a. a.chor-sha.ed SEN. Four monitoring points a. the molten steel in the centered vertica. pla.e were selected to tra.k the horizonta. a.d the vertica. component of the velocity vector. Two of them a.e loca.ed nea. the free surfa.e a.d the rema.ning two a.e loca.ed in the vicinity of the SEN discha.ge nozzles. Some sta.istica. va.ues of the time series of a.ove the velocity components a.e a.a.yzed a.d correla.ed with the Kelvin-Helmholtz insta.ility a.d the Ka.ma. vortex streets, which ca.se mold powder entra.ment in the molten steel.

关键词： Computa.iona. Fluid Dyna.ics Continuous Ca.ting Molten Steel Mold Powder Entra.ment Submerged Entry Nozzle Velocity Monitoring

Numerica. a.a.ysis of Sla. Ca.ry-Over during Molten Steel Dra.ning

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Open Journa. of a.plied Sciences 2017年第11期7卷 611-616页

作者： Da.iel Flores-Sa.chez miguel a. barron Depa.tmento De Ma.eria.es Universidad Autonoma Metropolitana Mexico City Mexico

Sla. ca.ry-over during the dra.ning of molten steel from a.teeming la.le is numerica.ly studied here. Two-pha.e isotherma. tra.sient 3D Computa.iona. Fluid Dyna.ics simula.ions were employed to simula.e the dra.ning process. Two nozzle dia.eters, two nozzle positions a.d three sla. heights were considered. From ma.s ba.a.ces, the sla. ca.ry-over in terms of ma.s flow ra.e wa. obta.ned for ea.h of the a.ove va.ia.les. Besides, the dra.ning times of the teeming la.le were estima.ed from theoretica. considera.ions a.d CDF simula.ions, a.d compa.ed.

关键词： CFD Simula.ions Dra.ning Time Multipha.e Flow Sla. Ca.ry-Over Teeming La.le

Numerica. Simula.ion of the Flow of a.Molten Bla.t Furna.e Sla. in a. Open Cha.nel

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World Journa. of Engineering a.d Technology 2024年第4期12卷 963-975页

作者： miguel a. barron Joa. Reyes a.isteo Ga.rido Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Mexico City Mexico

Despite its industria. importa.ce, the flow of molten bla.t furna.e sla. in open cha.nels ha. not been sufficiently studied. In this work, the unstea.y non-uniform flow of a.molten bla.t furna.e sla. in a.recta.gula. open cha.nel is numerica.ly studied by solving the Sa.nt-Vena.t equa.ions by mea.s of a. explicit ba.kwa.ds finite difference scheme. a. a.rhenius-type dependence of the viscosity of the sla. on tempera.ure is a.sumed. To ca.cula.e tha. viscosity, four tempera.ures a.e considered, na.ely 1450˚C, 1500˚C, 1550˚C a.d 1600˚C. To study the dyna.ic response of the system, a.ha.f-sinusoida. pulse with dura.ion of 5 s is imposed a. the cha.nel entra.ce. a.cording to the numerica. simula.ions, for a.l the tempera.ures considered, the sla. flow in the cha.nel for a. a.gle of 5 degrees is supercritica. in na.ure. However, for a. a.gle of 1 degree, the flow is tra.scritica., tha. is, it presents a.tra.sition from subcritica. to supercritica..

关键词： Bla.t Furna.e Sla. Molten Sla. Open Cha.nel Flow Sa.nt-Vena.t Equa.ions Supercritica. Flow Tra.scritica. Flow

Tempera.ure Drop of Molten Meta.s in Open Cha.nels

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World Journa. of Engineering a.d Technology 2024年第3期12卷 493-500页

作者： miguel a. barron-Meza.Joa. Reyes-Mira.da Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

The tempera.ure drop of molten meta. flowing in open cha.nels is numerica.ly determined. Recta.gula., tra.ezoida. a.d tria.gula. geometries a.e considered. The overa.l hea. tra.sfer coefficients for the bottom, side wa.ls a.d free surfa.e of the cha.nel ha.e been ta.en from the litera.ure. For ea.h geometry, the volumetric flow ra.e, mea. residence time a.d tempera.ure drop a. a.function of the cha.nel inclina.ion a.gle were determined. The recta.gula. a.d tra.ezoida. geometries present the sma.lest tempera.ure drops, while the tria.gula. geometry presents the grea.est tempera.ure drop. The fa.tors tha. most a.fect this drop a.e the va.ue of the free surfa.e a.ea.of the cha.nel, a.d the a.era.e residence time of the molten meta. in the cha.nel.

关键词： Free Surfa.e Hea. Tra.sfer Molten Meta. Open Cha.nel Geometry Residence Time Tempera.ure Drop

a.chor-Sha.ed Design of a.Submerged Entry Nozzle for the Continuous Ca.ting of Steel

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Open Journa. of a.plied Sciences 2016年第9期6卷 593-600页

作者： Ca.los a. Herna.dez miguel a. barron Ra.l Mira.da Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Mexico City Mexico Depa.ta.ento de Electronica Universidad Autonoma Metropolitana Azcapotzalco Mexico City Mexico

a. a.chor-sha.ed geometrica. design for a.Submerged Entry Nozzle for the sla. continuous ca.ting of steel is presented in this work. To eva.ua.e its performa.ce, tra.sient 3D multipha.e numerica. simula.ions were ca.ried out using the Computa.iona. Fluid Dyna.ics technique. The performa.ce of the proposed nozzle is numerica.ly compa.ed with tha. of a.conventiona. cylindrica. nozzle. Computer results show tha. the cha.ce of forma.ion of Ka.ma.’s vortexes a.d powder entra.ment becomes sma.l for the a.chor-sha.ed SEN.

关键词： a.chor-Sha.ed SEN Computa.iona. Fluid Dyna.ics Continuous Ca.ting Numerica. Simula.ions Sla. Ca.ting Submerged Entry Nozzle

a.a.ysis of the Flow of a.Molten Sla. in a. Open Cha.nel Using Tra.sient a.d Stea.y-Sta.e Solutions of the Sa.nt-Vena.t Equa.ions

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World Journa. of Engineering a.d Technology 2024年第4期12卷 976-986页

作者： miguel a. barron Joa. Reyes a.isteo Ga.rido Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

In recent yea.s, meta.lurgica. sla.s ha.e been increa.ingly used a. ma.eria.s for the ma.ufa.ture of cement, pa.ement a.d filling ma.eria.. The tra.sport of the molten sla. to the receiving pots is ca.ried out through open cha.nels. The tra.sient a.d stea.y-sta.e flow of a.molten sla. in a.recta.gula. open cha.nel is numerica.ly a.a.yzed here. For the tra.sient flow, the Sa.nt-Vena.t equa.ions were numerica.ly solved. For the stea.y-sta.e flow, the deriva.ives in time a.d spa.e in the Sa.nt-Vena.t equa.ions were set equa. to zero a.d a.polynomia. of degree 3 is obta.ned whose roots a.e the sla. height va.ues. It wa. a.sumed tha. the viscosity of the sla. ha. a. a.rhenius-type beha.ior with tempera.ure. Four va.ues of tempera.ure va.ues, na.ely 1723.15, 1773.15, 1823.15, 18873.15 ˚K, a.d five va.ues of the a.gle of inclina.ion of the cha.nel, na.ely 1, 2, 3, 4, 5 degrees, a.e considered. Numerica. results show tha. the stea.y-sta.e va.ues of the height a.d velocity of the molten sla. depend strongly on the tempera.ure of the sla. a.d the a.gle of inclina.ion of the cha.nel. a. the sla. tempera.ure a.d cha.nel a.gle increa.e, the va.ue of the stea.y-sta.e sla. height decrea.es. The va.ue of the stea.y-sta.e sla. velocity increa.es a. the sla. tempera.ure a.d cha.nel inclina.ion a.gle increa.e.

关键词： Molten Sla. Open Cha.nel Pha.e-Portra.t Sa.nt-Vena.t Equa.ions Stea.y Sta.e Tra.sient Solution

Energy Tra.sfer a.ong Modes in a.Non-Slender Ela.tic Bea. Subject to Vortex-Induced Vibra.ion

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Computer Technology a.d a.plica.ion 2013年第5期4卷 266-270页

作者： miguel a. barron Dulce Medina.Isa.a. Hilerio Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Col. Reynosa-Tamaulipas Mexico 02200 Mexico

The vibra.ion of a. ela.tic bea. experiencing vortex-induced vibra.ion is numerica.ly a.a.yzed employing a.wa.e-oscilla.or model. The influence of the excited mode, the initia. velocity, the shedding pulsa.ion a.d the ma.s ra.io on the energy tra.sfer a.ong modes a.d the vibra.ion a.plitude is determined. Multiple frequencies a.e detected, a.d the power spectra. density of the bea. tip time series is used to ca.cula.e the domina.t frequency.

关键词： Ela.tic bea. energy tra.sfer fluid-structure problem power spectra. density vibra.ion modes vortex-induced vibra.ion wa.e-oscilla.or model.