NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(01) [January 2005] >


Title: Simulation and experimental verification of solutal convection in the initial stages of crystal growth from an aqueous solution
Authors: Verma, Sunil
Srivastava, Atul
Prabhakar, Vivek
Muralidhar, K
Wadhawan, V K
Keywords: Computer simulation
Convection
Heat transfer
Crystal growth from solution
Potassium dihydrogen phosphate
Shadowgraphy
Issue Date: Jan-2005
Publisher: CSIR
IPC CodeC3 0B 7/00
Abstract: Three-dimensional, unsteady numerical simulation of transport phenomena during the initial stages of growth of the KDP crystal from its aqueous solution and comparison with experiments have been presented. The convective field in the solution is set-up due to density differences between the supersaturated solution in the bulk and the saturated solution in the vicinity of the crystal. The flow field in the solution has been visualized using a shadowgraph technique. Numerical as well as experimental results of the growth under free convection show that convection is initially set-up in the vicinity of the crystal, while the solution in the rest of the growth chamber is relatively stagnant. The initial flow patterns show symmetry to a great extent. The influence of the crystal rotation on the concentration field has been additionally studied through numerical simulations. When the crystal is rotated, the gradients in concentration between the region near to the crystal and far away from it are high. This is a desirable requirement for a higher crystal growth rate. With the passage of time, the length scales of convection span the growth chamber, and a purely unsteady flow field is established. The numerical simulation could not be continued for such long durations owing to excessive requirement of computational resources. However, a good agreement between simulation and experiments for short times indicates that the imaging of the flow field provides a useful strategy for continuous monitoring of crystal growth.
Page(s): 24-33
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.43(01) [January 2005]

Files in This Item:

File Description SizeFormat
IJPAP 43(1) 24-33.pdf1.57 MBAdobe PDFView/Open
 Current Page Visits: 968 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 556174 since 06-Feb-2009  Last updated on 15-Jul-2014Webmaster: nopr@niscair.res.in