**Nomenclature**

sumed that the mechanism of the droplet drying is similar for both small and large diame‐ ters. Therefore, it is recommended that a more accurate technique for measuring droplets

The new model predicted temperature distribution profiles for single droplets of various ma‐ terials. The predicted results showed a good agreement with the experimental data for air

paste due to the higher thermal conductivity of the formed crust. A correction factor should be developed and taken into account for such materials. The model provides a relatively fast and efficient way to simulate drying behavior over a range of drying conditions. The model also

Moisture content profiles clearly showed the two stages of the drying process. In addition, the moisture profiles supported the conclusions that the crust forming in the falling rate pe‐

represents a useful tool in the design and optimization of spray drying processes.

C. However, the model was less accurate in the case of organic

with small sizes and for the taking of surface temperatures be developed.

**Figure 22.** Moisture content profile for all samples at air temperature of 140o C.

C and 140o

192 Wind Tunnel Designs and Their Diverse Engineering Applications

riod decreased both the moisture content and the drying rate.

temperatures at 75o


#### **Subscripts**

