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Simulation of macrosegregation in direct-chill casting : a model based on meshless diffuse approximate method
ID
Hatić, Vanja
(
Avtor
),
ID
Mavrič, Boštjan
(
Avtor
),
ID
Šarler, Božidar
(
Avtor
)
PDF - Predstavitvena datoteka,
prenos
(3,83 MB)
MD5: 3366AEBBB6598AE5E5C808A9C5AAADDD
URL - Izvorni URL, za dostop obiščite
https://www.sciencedirect.com/science/article/pii/S0955799719306678
Galerija slik
Izvleček
A multiphysics numerical model has been developed for prediction of macrosegregation in direct-chill casting. The model uses volume averaged mass, momentum, energy, and species conservation equations to simulate the solidification of axisymmetric aluminium-alloy billets. The boundary conditions for the heat transfer include the effects of hot top, mould chill, and direct chill. The volume averaged conservation equations are solved with the explicit local meshless diffuse-approximate method. The approximation coefficients are evaluated on subdomains containing 14 nodes with the second order polynomial basis and the Gaussian weight function. Problems with instabilities due to strong convection are successfully eliminated with an adaptive shift of the weight function and evaluation position in the upstream direction. The automatic adaptive generation of computational node arrangement decreases the calculation time and in a straightforward way enables investigation of the complex flow for geometrically different inflow structures, including sharp and curved edges. The model is used for casting simulation of an Al-5.25wt%Cu alloy billet with a 120 mm radius for various inlet designs. The effect of inlet geometry on the temperature, solid fraction, melt flow, and macrosegregation is investigated. The described developments represent a first meshless numerical approach for simulation of macrosegregation of an important industrial process.
Jezik:
Angleški jezik
Ključne besede:
direct-chill casting
,
macrosegregation
,
meshless methods
,
diffuse-approximate method
,
inlet design
,
realistic geometry
,
solidification
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2020
Št. strani:
Str. 191-203
Številčenje:
Vol. 113
PID:
20.500.12556/RUL-137769
UDK:
621.7(045)
ISSN pri članku:
0955-7997
DOI:
10.1016/j.enganabound.2019.12.006
COBISS.SI-ID:
17024283
Datum objave v RUL:
30.06.2022
Število ogledov:
720
Število prenosov:
100
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Engineering analysis with boundary elements
Skrajšan naslov:
Eng. anal. bound. elem.
Založnik:
Elsevier
ISSN:
0955-7997
COBISS.SI-ID:
5605380
Licence
Licenca:
CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:
Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
polkontinuirano ulivanje
,
makroizcejanje
,
brezmrežne metode
,
metoda difuzijskih približkov
,
vtočna oblika
,
realistična geometrija
,
strjevanje
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
J2-7384
Naslov:
Napredno modeliranje in simulacija kapljevito-trdnih procesov s prostimi robovi
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0162
Naslov:
Tranzientni dvofazni tokovi
Financer:
EC - European Commission
Program financ.:
European Structural and Investment Funds
Akronim:
MARTIN
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
Slovenia, Ministry of Education, Science and Sport
Akronim:
MARTIN
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