Abstract
A wind tunnel was designed and constructed to study the phenomena of diffusion, deposition, and reentrainment of anthracite and bituminous coal dust particles. Air-velocity profiles and turbulent-intensity profiles were measured in the wind tunnel. A mathematical model of the turbulent flow in the wind tunnel was developed. The solution to the model was derived using a finite difference scheme that was programmed for the computer. This article presents the design and construction of the wind tunnel. The development of the mathematical model, solution procedure, and the computer program are discussed. The characteristics of the wind tunnel were developed by plotting the pressure drop as a function of air velocity. It was observed from the results that the measured and computed velocity profiles agreed well outside the boundary layer. The wind tunnel is suitable for experimental studies on several aspects of particulate phenomena, such as dispersion, diffusion, transport, and reentrainment.