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*Fri Oct 29 20:54:12 2004 UTC*
(19 years, 10 months ago)
by *aw0a*

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File MIME type: text/x-ascend

File size: 3611 byte(s)

Setting up web subdirectory in repository

1 | REQUIRE "atoms.a4l"; |

2 | (* => atoms.a4l, measures.a4l, system.a4l, basemodel.a4l *) |

3 | PROVIDE "vesselMethods.a4c"; |

4 | (* |

5 | * This file is part of the ASCEND Modeling Library and is released |

6 | * under the GNU Public License as described at the end of this file. |

7 | *) |

8 | |

9 | MODEL vessel; |

10 | NOTES |

11 | 'author' SELF {Arthur W. Westerberg} |

12 | 'creation date' SELF {May, 1998} |

13 | END NOTES; |

14 | |

15 | (* variables *) |

16 | side_area "the area of the cylindrical side wall of the vessel", |

17 | end_area "the area of the flat ends of the vessel" |

18 | IS_A area; |

19 | |

20 | vessel_vol "the volume contained within the cylindrical vessel", |

21 | wall_vol "the volume of the walls for the vessel" |

22 | IS_A volume; |

23 | |

24 | wall_thickness "the thickness of all of the vessel walls", |

25 | H "the vessel height (of the cylindrical side walls)", |

26 | D "the vessel diameter" |

27 | IS_A distance; |

28 | |

29 | H_to_D_ratio "the ratio of vessel height to diameter" |

30 | IS_A factor; |

31 | |

32 | metal_density "density of the metal from which the vessel |

33 | is constructed" |

34 | IS_A mass_density; |

35 | |

36 | metal_mass "the mass of the metal in the walls of the vessel" |

37 | IS_A mass; |

38 | |

39 | (* equations *) |

40 | FlatEnds: end_area = 1{PI} * D^2 / 4; |

41 | Sides: side_area = 1{PI} * D * H; |

42 | Cylinder: vessel_vol = end_area * H; |

43 | Metal_volume: (side_area + 2 * end_area) * wall_thickness = wall_vol; |

44 | HD_definition: D * H_to_D_ratio = H; |

45 | VesselMass: metal_mass = metal_density * wall_vol; |

46 | |

47 | METHODS |

48 | |

49 | METHOD specify; |

50 | NOTES |

51 | 'purpose' SELF {to fix four variables and make the problem well-posed} |

52 | END NOTES; |

53 | vessel_vol.fixed := TRUE; |

54 | H_to_D_ratio.fixed := TRUE; |

55 | wall_thickness.fixed := TRUE; |

56 | metal_density.fixed := TRUE; |

57 | END specify; |

58 | |

59 | METHOD values; |

60 | NOTES |

61 | 'purpose' SELF {to set the values for the fixed variables} |

62 | END NOTES; |

63 | H_to_D_ratio := 2; |

64 | vessel_vol := 250 {ft^3}; |

65 | wall_thickness := 5 {mm}; |

66 | metal_density := 5000 {kg/m^3}; |

67 | END values; |

68 | |

69 | METHOD bound_self; |

70 | END bound_self; |

71 | |

72 | METHOD scale_self; |

73 | END scale_self; |

74 | |

75 | METHOD default_self; |

76 | D := 1 {m}; |

77 | H := 1 {m}; |

78 | H_to_D_ratio := 1; |

79 | vessel_vol := 1 {m^3}; |

80 | wall_thickness := 5 {mm}; |

81 | metal_density := 5000 {kg/m^3}; |

82 | END default_self; |

83 | |

84 | END vessel; |

85 | |

86 | ADD NOTES IN vessel; |

87 | 'description' SELF {This model relates the dimensions of a |

88 | cylindrical vessel -- e.g., diameter, height and wall thickness |

89 | to the volume of metal in the walls. It uses a thin wall |

90 | assumption -- i.e., that the volume of metal is the area of |

91 | the vessel times the wall thickness.} |

92 | 'purpose' SELF {to illustrate the insertion of notes into a model} |

93 | END NOTES; |

94 | |

95 | |

96 | (* |

97 | * vesselMethods.a4c |

98 | * by Arthur W. Westerberg |

99 | * Part of the ASCEND Library |

100 | * $Date: 1998/06/17 19:35:03 $ |

101 | * $Revision: 1.2 $ |

102 | * $Author: mthomas $ |

103 | * $Source: /afs/cs.cmu.edu/project/ascend/Repository/models/vesselMethods.a4c,v $ |

104 | * |

105 | * This file is part of the ASCEND Modeling Library. |

106 | * |

107 | * Copyright (C) 1998 Carnegie Mellon University |

108 | * |

109 | * The ASCEND Modeling Library is free software; you can redistribute |

110 | * it and/or modify it under the terms of the GNU General Public |

111 | * License as published by the Free Software Foundation; either |

112 | * version 2 of the License, or (at your option) any later version. |

113 | * |

114 | * The ASCEND Modeling Library is distributed in hope that it |

115 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |

116 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |

117 | * See the GNU General Public License for more details. |

118 | * |

119 | * You should have received a copy of the GNU General Public License |

120 | * along with the program; if not, write to the Free Software |

121 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139 USA. Check |

122 | * the file named COPYING. |

123 | *) |

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