DISTRIBUTION OF LIQUID-SOLID HEAT-TRANSFER COEFFICIENT AMONG SUSPENDED PARTICLES IN VERTICAL HOLDING TUBES OF AN ASEPTIC PROCESSING SYSTEM

Mass transfer coefficients between sucrose coated particles and water as the suspending fluid, were measured to obtain values of the heat tr ansfer coefficient by analogy with mass transfer. in a vertical holdin g tube configuration, the mass transfer coefficient spanned considerab le range for those particles with comparable residence time. At Reynol ds number 26100, the average mass transfer Sherwood number expressed i n terms of residence time was Sh=-110.4t+215.1, and it scattered norma lly with standard deviation 19.2. The results indicated that heat tran sfer coefficients vary among particles with different residence times and may be significantly different even for particles with the same re sidence time.