Settling velocity of equiaxed dendrites in a tube

doi:10.1088/1674-1056/22/1/018101

Abstract The settling velocity of equiaxed dendrites can cause macrosegregation and influence the structure of the equiaxed zone during the casting solidification process. So an understanding of the settling characteristics is needed to predict the structure and segregation in castings. The settling velocity of NH₄Cl equiaxed dendrites of non-spherical geometry was studied experimentally in an NH₄Cl-70wt.%H₂O solution. A calculation formula was proposed to calculate the settling velocity of sediment equiaxed dendrites in a tube filling with saturated solution at a moderate Reynolds number region. The retardation effects of wall and morphology of the equiaxed dendrite on the settling velocity were taken into account in the development of the calculation formula, and the correction function B of drag coefficient with consideration of the retardation effects of wall and morphology of the equiaxed dendrite on the settling velocity of the equiaxed dendrite was calibrated according to the experimental results. A comparison showed that the formula has a good accordance with the experimental results.

Keywords: equiaxed dendrite settling velocity morphology effect wall effect

Received: 08 August 2012
Revised: 31 October 2012
Accepted manuscript online:

PACS:	81.05.Bx	(Metals, semimetals, and alloys)
	47.50.Cd	(Modeling)
	47.57.ef	(Sedimentation and migration)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB10402), the National Natural Science Foundation of China (Grant Nos. 50901061 and 50971102), and the Foundation of State Key Laboratory of Solidification Processing, China (Grant Nos. 02-TZ-2008 and 36-TP-2009).

Corresponding Authors: Wang Meng
E-mail: wangmeng@nwpu.edu.cn

Cite this article:

Zhou Peng (周鹏), Wang Meng (王猛), Lin Xin (林鑫), Huang Wei-Dong (黄卫东) Settling velocity of equiaxed dendrites in a tube 2013 Chin. Phys. B 22 018101

[1]	Biloni H and Chalmers B 1968 J. Mater. Sci. 3 139
[2]	Murakami K and Okamoto T 1984 Materials Science 18 103
[3]	Ohno A (Translated by Xing Jian-Dong) 1990 Solidification of Metals: Theory, Practice and Application (Beijing: China Machine Press) pp. 30-33 (in Chinese)
[4]	Li G, Gao Y P, Sun Y N, Chi Z H and Liu R P 2008 Chin. Phys. B 17 3412
[5]	Flemings M C 1974 Metall. Mater. Trans. B 5 2121
[6]	Yao W J, Yang C, Han X J, Chen M, Wei B B and Guo Z Y 2003 Acta Phys. Sin. 52 448 (in Chinese)
[7]	Li Q, Feng W L, Hu X M, Cao Q, Sha D G and Li J M 2008 Chin. Phys. B 17 726
[8]	Allen B C and Isserow S 1957 Actal Metall. 5 465
[9]	Weinberg F 1984 Metall. Trans. B 15B 479
[10]	Yow H N, Pitt M J and Salman A D 2005 Advanced Powder Technol. 16 363
[11]	Zakhem R, Weidman P D and de Groh III H C 1992 Metall. Trans. A 23A 2169
[12]	de Groh H C, Weidman P D, Zakhem R, Ahuja S and Beckermann C 1993 Metall. Trans. B 24 749
[13]	Mirihanage W U and Browne D J 2010 Comput. Mater. Sci. 50 260
[14]	Zhang Q Y, Peng Z, He R, Liu R, Lu K Q and Hou M Y 2007 Acta Phys. Sin. 56 4708 (in Chinese)
[15]	Chen Z H, Fan B C, Nadine A and Zhou B M 2006 Chin. Phys. Lett. 23 154
[16]	Dong P, Feng S D and Zhao Y 2004 Chin. Phys. B 13 434
[17]	Olson R B and Wright S J 1990 Essentials of Engineering Fluid Mechanics (New York: Harper and Row publishers)
[18]	Wu C L and Zhan J M 2005 Chin. Phys. B 14 620
[19]	Haider A and Levenspiel 1989 Powder Technol. 58 63
[20]	Chhabra R P, Agarwal S and Chaudhary K 2003 Powder Technol. 129 53
[21]	Fidleris V and Whitmore R L 1961 Br. J. Appl. Phys. 12 490
[22]	Chhabra R P 1995 Powder Technol. 85 83
[23]	Shi Y F, Xu Q Y and Liu B C 2011 Acta Phys. Sin. 60 126101 (in Chinese)
[24]	Beckermann C and Wang C Y 1996 Metall. Trans. A 27A 2784
[25]	Tang R 2001 Journal of Southeast University (Natural Science Edition) 31 1 (in Chinese)
[26]	Jiménez J A, Madsen O S and Asce M 2003 J. Waterw. Port C-ASCE 129 70

[1]	Improved spatial filtering velocimetry and its application in granular flow measurement Ping Kong(孔平), Bi-De Wang(王必得), Peng Wang(王蓬), Zivkovic V, Jian-Qing Zhang(张建青). Chin. Phys. B, 2020, 29(7): 074201.
[2]	Phase--field model of isothermal solidification with multiple grains growth Feng Li(冯力), Wang Zhi-Ping(王智平), Zhu Chang-Sheng(朱昌盛), and Lu Yang(路阳). Chin. Phys. B, 2009, 18(5): 1985-1990.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

Settling velocity of equiaxed dendrites in a tube

Cite this article:

Online attention