What is floodability?
2023-07-18WIKI
Floodability is an indicator used to describe the splashing properties of the powder after overcoming gravity. Similar to flowability, according to the Carr indices chart, floodability can be evaluated through the sum of four indices, representing four parameters of the powder sample, namely flowability, the angle of fall, the angle of difference, and dispersibility. The following chart shows how the parameter values are converted to their corresponding indices.
Carr Indices Chart of Floodability
|
Flowability |
Angle of Fall |
Angle of Difference |
Dispersibility |
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|
Value |
Index |
Degree |
Index |
Degree |
Index |
% |
Index |
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|
≥60 59-56 55 54 53-50 49 48 47-45 44 43 42-40 39 38 37-34 33 32 31-29 28 27 26-23 ≤23 |
25 24 22.5 22 21 20 19.5 18 17.5 17 16 15 14.5 12 10 9.5 8 6.25 6 3 0 |
≤10 11-19 20 21 22-24 25 26 27-29 30 31 32-39 40 41 42-49 50 51 52-56 57 58 59-64 ≥64 |
25 24 22.5 22 21 20 19.5 18 17.5 17 16 15 14.5 12 10 9.5 8 6.25 6 3 0 |
≥30 29-28 27 26 25 24 23 22-20 19 18 17-16 15 14 13-11 10 9 8 7 6 5-1 0 |
25 24 22.5 22 21 20 19.5 18 17.5 17 16 15 14.5 12 10 9.5 8 6.25 6 3 0 |
≥50 49-44 43 42 41-36 35 34 33-29 28 27 26-21 20 19 18-11 10 9 8 7 6 5-1 0 |
25 24 22.5 22 21 20 19.5 18 17.5 17 16 15 14.5 12 10 9.5 8 6.25 6 3 0 |
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|
Evaluation of Floodability |
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|
Degree |
Very High |
Fairly High |
Tends to Flush |
May Flush |
Won’t Flush |
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|
Sum of Indices |
80-100 |
60-79 |
40-59 |
25-39 |
0-24 |
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 |
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