Heat transfer from a horizontal tube in a magnetofluidized bed

Abstract

Heat transfer coefficient values are reported for a horizontal Nylon 24.1 mm diameter heated probe immersed in an iron shot bed of 1511 μm average diameter and exposed to an external uniform magnetic field collinear with the fluidizing air velocity. The electromagnet produces a maximum constant magnetic-field intensity of 27,850 A/m in a cylindrical central region, 152.4 mm in diameter and 152.4 mm in height, within a constancy of 1%. Total and local heat transfer coefficients are measured at different axial and angular positions over a range of air velocity (0.28–2.50 m/s) and magnetic-field intensity (0.0–19,974 properties, viz., minimum fluidization and bubbling velocities and mean bed voidage.