MAXIMUM DENSITY EFFECT ON LAMINAR WATER PIPE-FLOW SOLIDIFICATION

This paper investigates experimentally and numerically the effect of m aximum density on laminar water pipe. flow solidification. To Visualiz e the secondary flow patterns and ice morphology experimentally; the w ater was seeded with a small amount of mercurochrome solution. The num erical analysis employs the large Prandtl number assumption and consid ers a gradual variation of solid shell in the streamwise direction. Th e experimental parameters cover the ranges of the dimensionless axial length from 0.008 to 0.32, the inlet water temperature from 5 to 20 de grees C; the wall temperature from -12 to 0 degrees C and the Rayleigh number from 10(4) to 3 x 10(6). The comparison of the measured and ca lculated heat transfer rates are in good agreement for wide ranges of operating parameters. (C) 1998 Elsevier Science Ltd. All rights reserv ed.