Abstract
A heat and mass transfer model has been developed using Computation Fluid Dynamics (CFD) to see the pattern of hot air flow, in the drying chamber in the rotary dryer. During the experiment parameters used as input data on CFD are air flow velocity and temperature drying in experimental measurements in the range of 1 hour, 2 hours and 3 hours. CFD analysis results show the uneven distribution of heat in the drying chamber in a variation of 1 hour and 2 hours. The CFD contour indicates that heat only spreads to the top and center of the drying chamber. The average temperature of the top of the drying chamber is 51,75°C, while at the bottom is 45,19°C. The simulation results on 3 hours of drying showed that the contour of hot air spread fairly evenly in the drying chamber with an average drying room temperature of 46,3°C. The air flow rate and air velocity in the drying chamber are quite constant with an average of 3,3 m/s.
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