Particulate Material Dynamics
Demonstrate knowledge of particulate materials and of fluid-particle dynamics.
- Learning Outcomes
- 1.Demonstrate knowledge of properties of particulate materials
2.Describe the principles of particle size measurement, particle size distribution, specific surface area, and particle size reduction.
3.Calculate terminal velocities of solid particles moving in a fluid under gravitational and other forces.
4.Calculate the pressure drop of a fluid flowing through a bed of particles and a porous medium.
5.Demonstrate knowledge of pneumatic and hydraulic conveying of particles.
- Bulk density, particle density (freely formed, tapped density), particle size distributions, specific surface area, angle of repose, shape factor, terminal velocity, bed porosity.
Different particle size distributions are measured in accordance with standard sieving techniques and using microscope techniques.
Specific surface areas of different particle size distributions are calculated from assumed shape factors and measured particle size distributions.
Principles of particle size reduction are described in terms of material properties and energy requirements.
Forces on particles moving in a fluid are described and calculated in accordance with Stoke's and Newton's laws, spherical and non-spherical particles (excluding fibres) gases, liquids. Settling under gravity (drag coefficient, terminal velocity, effects of shape and orientation)
Pressure drops (air, water) are calculated in accordance with the Carmen-Kozeny equation, (bed of particles, porous body).
The principles and operation of pneumatic and hydraulic conveying of particles are described.
- Assessment Criteria
- Assignments and Tests30