Spray drying is appropriate for the desiccation of pharmaceutical and alimentary items. Numerical studies with computational fluid dynamics (CFD) on spray dryers can estimate results comparable to experimental methods, so they are widely used in spray dryer research. This numerical simulation aims to examine the correlation between alterations in the input direction from co-current to mixed flow, with differences in temperature and droplet size, and their impact on the residence duration of particles inside the drying chamber, using the k-ω SST turbulence model to simulate the flow, and the standard k-ε to predict particles. In mixed flow, small-diameter droplets (10 and 30 μm) have a longer particle residence time (9.4 and 4.4 seconds) than in co-current flow; on the other hand, it becomes faster (≤1.2 seconds) for droplet diameters ≥50 μm. Spraying droplets in a mixed flow spray dryer will reduce the residence time of particles relative to co-current flow; larger droplet diameters result in shorter residence times.
Numerical investigation changing airflow direction and incoming particle size to reduce residence time in spray dryer
Authors
- Henry Carles Mechanical Engineering Department, Diponegoro University, Jl. Prof. Soedarto, SH., Semarang 50275, and Department of Mechanical Engineering, Faculty of Engineering, Mercu Buana University, Jl. Meruya Selatan no.1, Jakarta Barat 11650, Indonesia.
- Eflita Yohana Mechanical Engineering Department, Diponegoro University, Jl. Prof. Soedarto, SH., Semarang 50275, Indonesia.
- Mohamad Djaeni Chemical Engineering Department, Diponegoro University Jl. Prof. Soedarto, SH., Semarang 50275, Indonesia.
- Mohammad Tauviqirrahman Mechanical Engineering Department, Diponegoro University, Jl. Prof. Soedarto, SH., Semarang 50275, Indonesia.
- Shofwan Bahar Mechanical Engineering Department, Diponegoro University, Jl. Prof. Soedarto, SH., Semarang 50275, Indonesia.
- Eka Dharmawan Mechanical Engineering Department, Diponegoro University, Jl. Prof. Soedarto, SH., Semarang 50275, Indonesia.
- Kwang- Hwan Choi College of Engineering, Pukyong National University 365 Sinseon-ro, Nam-gu, Busan 608-739, Republic of Korea.
