Table 9 The average velocities of coal particles in regions A, B, C and D.

From: Numerical simulation of coal particle motion characteristics in the envelope region of spiral drum based on discrete element method

Rotation speed/r min−1

Average velocity/m s−1

Region A

Region B

Region C

Region D

4

X

0.211

0.385

0.471

0.692

Y

− 0.450

− 0.300

− 0.237

− 0.115

Z

− 0.160

− 0.120

− 0.235

0.250

5

X

0.309

0.474

0.535

0.838

Y

− 0.543

− 0.372

− 0.296

− 0.123

Z

− 0.155

− 0.197

− 0.201

0.375

6

X

0.429

0.557

0.620

0.925

Y

− 0.578

− 0.449

− 0.348

− 0.157

Z

− 0.151

− 0.209

− 0.191

0.411

7

X

0.472

0.637

0.707

1.047

Y

− 0.698

− 0.540

− 0.418

− 0.165

Z

− 0.208

− 0.179

− 0.143

0.495

8

X

0.578

0.705

0.815

1.181

Y

− 0.778

− 0.630

− 0.462

− 0.191

Z

− 0.158

− 0.139

− 0.034

0.633

9

X

0.640

0.793

0.895

1.309

Y

− 0.856

− 0.693

− 0.498

− 0.207

Z

− 0.046

− 0.070

− 0.018

0.699

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