The first lecture in the module Particle Technology, delivered to second year students who have already studied basic fluid mechanics. Some applications of Particle Technology are described, in industry and nature, and particle size analysis and means of representing the data. The format for the laboratory classes for the module and their reports are covered.

1. Particle Technology Professor Richard Holdich R.G.Holdich@Lboro.ac.uk Watch this lecture at http://www.vimeo.com/9936959. Also visit; http://www.midlandit.co.uk/particletechnology.htm for further resources.

3. 1 Problem Class – tutorials & self study

4. 1 hour on: Moodle/Learn – tutorials & self study

5. Laboratories (oral, report & experimental)

7. 3 questions from 5

8. Question 1 obligatory PSD

9. Previous answers old papers on Learn

11. Dilute particulate systems

12. Hindered systems

13. Fluid flow in porous media/Fluidisation

14. Filtration

15. Membranes & colloids

16. Emulsions, surfaces & dispersions

17. Centrifugal separation

18. Two phase flow, rheology & powders

19. Gas cleaning

21. www.particles.org.uk

22. References:

23. 614.83 , 620.43, 621.54, 660.283 & 660.2842

24. Coulson & Richardson Vol 2;

25. Fundamentals of Particle Tech – free pdf book

27. Equivalent spherical diameters

28. Shape factors

29. Specific surface area

30. Size ranges and grades

31. Normalised distributions

34. Density

35. Molecular size

36. Heat capacity

37. Flow regime

38. Easy to define for a fluid

42. Hence volume shape factor is:

44. Hence Sv=6/x as is commonly used.

46. Size ranges and grades

47. Size ranges and grades

48. Normalised distributions

49. Normalised distributions

50. Normalised distributions

51. Normalised distributions

52. Normalised distributions

53. Normalised distributions

54. Normalised distributions

55. Normalised distributions

57. Specific surface: 0.944x105 m-1

59. Particle size analysis All techniques measure property and relate it to the equivalent spherical diameter. Select your technique to be the most appropriate for the end use of the data. The Coulter Counter The image above is provided by Beatop (OMEC) Instruments Limited. As found at Beatop (OMEC) Instruments Limited http://www.beatop.com/Particle_Counter/principle_illustration.html

60. Particle size analysis Malvern Sedimentation/Sedigraph

61. Particle size analysis

63. Shape factors

64. Specific surface area

65. Size ranges and grades

66. Normalised distributions

68. Problem given by boss

69. Might use Perry, C&R 6, etc.

70. But lab exp to check model, equations…

71. Model could be good, just your material…

73. Does dodgy model matter?

74. How to improve MODEL, not experiment

75. 2nd week, you tell us what you want to do

76. Repeating experiments only checks on reproducibility of experiment, nothing else

78. Bloggs, F., 2008, An anti-gravity machine, Journal of Good Ideas, 123, pp 22-33.