sandbox/screen.cpp at master · sanjivch/sandbox · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
#include <iostream>
#include <math.h>
using namespace std;

int main(){
  /*
     Karra Model for the Screen

     dw = diameter of the wire
     h =
     hT = effective throughfall aperture of the screen
     theta = angle of inclination of the deck

  */
  int S;
  double A, B, C, D, E, F, Gc, T, adj_A;
  double h, dw, theta;
  double hT, openArea;//hT in mm; A in metric tons/ hr m^2
  double overFracFeed, overHalfFracFeed, Xn, rhoBulk, screenArea;

  cin >> h >> dw >> theta;
  hT = (h + dw)*cos(theta) - dw;

  //=========================
  //A : The basic capacity
  //=========================

  if(hT < 51.0)
    A = 12.13*pow(hT, 0.32) - 10.3;
  else
    A = 0.34*hT + 14.41;

  openArea = 21.5*log(h) + 37;

  //===========================
  //B : The oversize factor
  //===========================
  if(overFracFeed <= 0.87)
    B = 1.6 - 1.2*overFracFeed;
  else
    B = 4.275 - 4.25*overFracFeed;

  //===========================
  //C : The half-size factor
  //===========================

  if(overHalfFracFeed <= 0.3)
    C = 0.7 + 1.2*overHalfFracFeed;
  else if(overHalfFracFeed > 0.3 && overHalfFracFeed <= 0.55)
    C = 2.053*pow(overHalfFracFeed, 0.564);
  else if(overHalfFracFeed > 0.55 && overHalfFracFeed <= 0.8)
    C = 3.35*pow(overHalfFracFeed, 1.37);
  else
    C = 5.0*overHalfFracFeed - 1.5;

  //============================
  //D : The deck location factor
  //============================

  D = 1.1 - 0.1*S;  //S=1 for top deck; S=2 for 2nd deck and so on...
  //============================
  //E : The wet screening factor
  //============================
  T = 1.26*hT;

  if(T < 1.0)
    E = 1.0;
  else if(T >= 1.0 && T < 2.0)
    E = T;
  else if(T >= 2.0 && T < 4.0)
    E = 1.5 + 0.25*T;
  else if(T >= 4.0 && T < 6.0)
    E = 2.5;
  else if(T >= 6.0 && T < 10.0)
    E = 3.25 - 0.125*T;
  else if(T >= 10.0 && T < 12.0)
    E = 4.5 - 0.25*T;
  else if(T >= 12.0 && T < 16.0)
    E = 2.1- 0.05*T;
  else if(T >= 16.0 && T < 24.0)
    E = 1.5 - 0.0125*T;
  else if(T >= 24.0 && T < 32.0)
    E = 1.35 - 0.00625*T;
  else
    E = 1.15;


  //===========================
  //F : The bulk density factor
  //===========================

  F = rhoBulk/ 1600.0;

  //==================================
  //Gc : The near size capacity factor
  //==================================
  Xn = 0.1; //Fraction of near-size feed between 1.25hT and 0.75hT
  Gc = 0.975*pow((1 - Xn), 0.511);


  Th = A*B*C*D*E*F*Gc*screenArea;


  cout <<"A: " << A ;
}