سال انتشار: ۱۳۸۴

محل انتشار: دهمین کنگره ملی مهندسی شیمی ایران

تعداد صفحات: ۱۱

نویسنده(ها):

TASKINI – The University of Guilan
HAGHI – The University of Guilan
GHANADZADEH – The University of Guilan

چکیده:

An approximate analysis is presented of the pressurization in a Solidifying sphere of molten material (Initially at a uniform melting temperature) immersed in an infinite cooling medium . The steady state approximate method is applied to the heat conduction problem with change of phase (The Stefan problem) . This Solution provides the temperature distribution in the shell and rate of solidification , which can be the solid shell .
Solidification is dependent both on Biot Number and temperature difference between melting temperature of the molten material and the bulk
temperature of the cooling medium . pressurization inside the solid shell increases abruptly in the very early stages of solidification , and then quickly levels off , approaching a maximum value. Stress distributions are evaluated and plotted in dimensionless from. Additional results are presented for the specific case of Aluminum alloy