/[ascend]/trunk/models/vesselPlain.a4c
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Contents of /trunk/models/vesselPlain.a4c

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Revision 2649 - (show annotations) (download) (as text)
Wed Dec 12 12:39:25 2012 UTC (9 years, 7 months ago) by jpye
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Fixing GPL header, removing postal address (rpmlint incorrect-fsf-address)
1 (* ASCEND modelling environment
2 Copyright (C) 1998, 2007 Carnegie Mellon University
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
16 *)
17 REQUIRE "atoms.a4l"; (* => atoms.a4l, measures.a4l, system.a4l, basemodel.a4l *)
18 (*
19 by Art Westerberg, 1998
20
21 This model illustrates how variables are declared and relations written.
22 The model contains no initialisation for any of the variable values, and
23 does not specify which variables are 'fixed' and which ones should be
24 solved for. For this reason, when loaded, this model will cause problems
25 that ASCEND will attempt to resolve through warnings to the user.
26 *)
27
28 MODEL vesselPlain;
29
30 (* variables *)
31 side_area, end_area IS_A area;
32 vessel_vol, wall_vol IS_A volume;
33 wall_thickness, H, D IS_A distance;
34 H_to_D_ratio IS_A factor;
35 metal_density IS_A mass_density;
36 metal_mass IS_A mass;
37
38 (* equations *)
39 FlatEnds: end_area = 1{PI} * D^2 / 4;
40 Sides: side_area = 1{PI} * D * H;
41 Cylinder: vessel_vol = end_area * H;
42 Metal_volume: (side_area + 2 * end_area) * wall_thickness = wall_vol;
43 HD_definition: D * H_to_D_ratio = H;
44 VesselMass: metal_mass = metal_density * wall_vol;
45
46 END vesselPlain;

john.pye@anu.edu.au
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