Projects per year
The local dynamics of fluidized pharmaceutical carrier powders in a turbulent channel flow was studied using particle image velocimetry (PIV) and High-speed, long-distance microscopy (HS-LDM). Four different lactose powders which have been used as a drug carrier in dry powder inhalers were used in this study. These powders have median powder particle diameters ranging between 61 and 121 µm. Air flow velocities ranging between 13.3 m/s and 66.7 m/s were examined. In addition, the effect of grid blockage ratio (ranging from ~25% to ~40% of the area of channel cross-section) was also investigated. Results show that the high-speed, long-distance microscopy (HS-LDM) technique was able to capture the mean velocity of the particles, and the results corresponded well with the PIV measurements. Results from the high-speed, long-distance microscopy (HS-LDM) method also demonstrate that the span of particle velocity closely follows that of the particle size distribution both for cohesive and non-cohesive powders. This study contributes towards an improved understanding of pharmaceutical carrier dynamics in turbulent channel flows and demonstrates how advanced image processing can be used to capture local particle dynamics.
|Number of pages||15|
|Journal||Experimental Thermal and Fluid Science|
|Publication status||Published - 1 Jun 2021|
- Two-phase flow
- Dry powder inhalers
- Lactose carriers
- Pharmaceutical carriers
- Advanced imaging techniques
Development of computational models to predict delivery of inhalation drug powders: from deagglomeration in devices to deposition in airways
Chan, H., Kourtmatzis, A., Cheng, S. & Yang, R.
1/09/18 → 31/08/21
Cheng, S. & Kourmatzis, A.
1/01/17 → …