scholarly journals Numerical Simulation of Macrosegregation Caused by Thermal–Solutal Convection and Solidification Shrinkage Using ALE Model

2019 ◽  
Vol 32 (11) ◽  
pp. 1396-1406 ◽  
Author(s):  
Kang-Xin Chen ◽  
Hou-Fa Shen
Keyword(s):  
Numerical Simulation ◽  
Solidification Shrinkage ◽  
Solutal Convection

scholarly journals Shrinkage Porosity Criterion and Its Application to A 5.5 Ton Steel Ingot

2016 ◽  
Vol 16 (2) ◽  
pp. 27-32 ◽  
Author(s):  
C. Zhang ◽  
Y. Bao ◽  
M. Wang ◽  
L. Zhang
Keyword(s):  
Numerical Simulation ◽  
Mushy Zone ◽  
Pressure Gradient ◽  
Physical Properties ◽  
Steel Ingot ◽  
Threshold Value ◽  
Shrinkage Porosity ◽  
Diameter Ratio ◽  
Solidification Shrinkage ◽  
Ingot Solidification

Abstract In order to predict the distribution of shrinkage porosity in steel ingot efficiently and accurately, a criterion R√L and a method to obtain its threshold value were proposed. The criterion R√L was derived based on the solidification characteristics of steel ingot and pressure gradient in the mushy zone, in which the physical properties, the thermal parameters, the structure of the mushy zone and the secondary dendrite arm spacing were all taken into consideration. The threshold value of the criterion R√L was obtained with combination of numerical simulation of ingot solidification and total solidification shrinkage rate. Prediction of the shrinkage porosity in a 5.5 ton ingot of 2Cr13 steel with criterion R√L>0.21 m · °C1/2 · s−3/2 agreed well with the results of experimental sectioning. Based on this criterion, optimization of the ingot was carried out by decreasing the height-to-diameter ratio and increasing the taper, which successfully eliminated the centreline porosity and further proved the applicability of this criterion.

Water uptake by substituted amylose tablets: experimentation and numerical simulation

2009 ◽  
Vol 00 (00) ◽  
pp. 090904073309027-8
Author(s):  
H.W. Wang ◽  
S. Kyriacos ◽  
L. Cartilier
Keyword(s):  
Numerical Simulation ◽  
Water Uptake
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