trunk/models/vesselMethods.a4c

REQUIRE "atoms.a4l";
(* => atoms.a4l, measures.a4l, system.a4l, basemodel.a4l *)
PROVIDE "vesselMethods.a4c";
(*
 * This file is part of the ASCEND Modeling Library and is released
 * under the GNU Public License as described at the end of this file.
 *)

MODEL vessel;
    NOTES
	'author' SELF {Arthur W. Westerberg}
	'creation date' SELF {May, 1998}
    END NOTES;

	(* variables *)
	side_area	"the area of the cylindrical side wall of the vessel",
	end_area	"the area of the flat ends of the vessel"
		IS_A area;

	vessel_vol	"the volume contained within the cylindrical vessel",
	wall_vol	"the volume of the walls for the vessel"
		IS_A volume;

	wall_thickness	"the thickness of all of the vessel walls",
	H		"the vessel height (of the cylindrical side walls)",
	D		"the vessel diameter"
		IS_A distance;

	H_to_D_ratio	"the ratio of vessel height to diameter"
		IS_A factor;

	metal_density	"density of the metal from which the vessel
			 is constructed"
		IS_A mass_density;

	metal_mass	"the mass of the metal in the walls of the vessel"
		IS_A mass;

	(* equations *)
FlatEnds:	end_area = 1{PI} * D^2 / 4;
Sides:		side_area = 1{PI} * D * H;
Cylinder:	vessel_vol = end_area * H;
Metal_volume:	(side_area + 2 * end_area) * wall_thickness = wall_vol;
HD_definition:	D * H_to_D_ratio = H;
VesselMass:	metal_mass = metal_density * wall_vol;

METHODS

METHOD specify;
    NOTES
	'purpose' SELF {to fix four variables and make the problem well-posed}
    END NOTES;
	FIX vessel_vol;
	FIX H_to_D_ratio;
	FIX wall_thickness;
	FIX metal_density;
END specify;

METHOD values;
    NOTES
	'purpose' SELF {to set the values for the fixed variables}
    END NOTES;
	H_to_D_ratio		:=	2;
	vessel_vol		:=	250 {ft^3};
	wall_thickness		:=	5 {mm};
	metal_density		:=	5000 {kg/m^3};
END values;

METHOD bound_self;
END bound_self;

METHOD scale_self;
END scale_self;

METHOD default_self;
	D			:=	1 {m};
	H			:=	1 {m};
	H_to_D_ratio		:=	1;
	vessel_vol		:=	1 {m^3};
	wall_thickness		:=	5 {mm};
	metal_density		:=	5000 {kg/m^3};
END default_self;

END vessel;

ADD NOTES IN vessel;
'description' SELF {This model relates the dimensions of a
	   cylindrical vessel -- e.g., diameter, height and wall thickness
	   to the volume of metal in the walls.  It uses a thin wall
	   assumption -- i.e., that the volume of metal is the area of
	   the vessel times the wall thickness.}
'purpose' SELF {to illustrate the insertion of notes into a model}
END NOTES;


(*
 *  vesselMethods.a4c
 *  by Arthur W. Westerberg
 *  Part of the ASCEND Library
 *  $Date: 1998/06/17 19:35:03 $
 *  $Revision: 1.2 $
 *  $Author: mthomas $
 *  $Source: /afs/cs.cmu.edu/project/ascend/Repository/models/vesselMethods.a4c,v $
 *
 *  This file is part of the ASCEND Modeling Library.
 *
 *  Copyright (C) 1998  Carnegie Mellon University
 *
 *  The ASCEND Modeling Library is free software; you can redistribute
 *  it and/or modify it under the terms of the GNU General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  The ASCEND Modeling Library is distributed in hope that it
 *  will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with the program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139 USA.  Check
 *  the file named COPYING.
 *)
1	aw0a	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	johnpye	576	FIX vessel_vol;
54			FIX H_to_D_ratio;
55			FIX wall_thickness;
56			FIX metal_density;
57	aw0a	1	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			*)