Updated 2017-03-09 23:21:50 by gold

## Introduction edit

gold Here is some eTCL code for One Dimension Heat Flow Model.

### Testcases Section

In planning any software, it is advisable to gather a number of testcases to check the results of the program. The math for the testcases can be checked by pasting statements in the TCL console. Aside from the TCL calculator display, when one presses the report button on the calculator, one will have console show access to the capacity functions (subroutines).

#### Testcase 1

table 1printed in tcl wiki format
quantity value comment, if any
testcase number:1
150.0 :initial temperature t1 degrees
640.0 :final temperature t2 degrees
0.3048 :length meters
10.0 :boundary length meters
0.3 :temperature constant
0.3 :temperature coefficient
481.98346456692906 :heat flux
164.9352 :temperature degrees

#### Testcase 2

table 2printed in tcl wiki format
quantity value comment, if any
testcase number:2
100.0 :initial temperature t1 degrees
600.0 :final temperature t2 degrees
1.0 :length meters
10.0 :boundary length meters
1.0 :temperature constant
1.0 :temperature coefficient
499.0 :heat flux
150.0 :temperature degrees

#### Testcase 3

table 3printed in tcl wiki format
quantity value comment, if any
testcase number:3
120.0 :initial temperature t1 degrees
530.0 :final temperature t2 degrees
5.0 :length meters
10.0 :boundary length meters
1.0 :temperature constant
1.0 :temperature coefficient
81.0 :heat flux
325.0 :temperature degrees

• Joran

## Appendix Code edit

### appendix TCL programs and scripts

```        # pretty print from autoindent and ased editor
# One Dimensional Heat Flow calculator
# written on Windows XP on eTCL
# working under TCL version 8.5.6 and eTCL 1.0.1
# gold on TCL WIKI, 10may2016
package require Tk
namespace path {::tcl::mathop ::tcl::mathfunc}
frame .frame -relief flat -bg aquamarine4
pack .frame -side top -fill y -anchor center
set names {{} {initial temperature t1 degrees:} }
lappend names {final temperature t2 degrees :}
lappend names {length meters: }
lappend names {boundary length meters:}
lappend names {temperature constant:}
lappend names {temperature coeffient: }
lappend names {temperature :}
foreach i {1 2 3 4 5 6 7 8} {
label .frame.label\$i -text [lindex \$names \$i] -anchor e
entry .frame.entry\$i -width 35 -textvariable side\$i
set msg "Calculator for One Dimensional Heat Flow
from TCL WIKI,
written on eTCL "
tk_messageBox -title "About" -message \$msg }
proc pi {} {expr acos(-1)}
proc calculate {     } {
global side1 side2 side3 side4 side5
global side6 side7 side8
global testcase_number
incr testcase_number
set side1 [* \$side1 1. ]
set side2 [* \$side2 1. ]
set side3 [* \$side3 1. ]
set side4 [* \$side4 1. ]
set side5 [* \$side5 1. ]
set side6 [* \$side6 1. ]
set side7 [* \$side7 1. ]
set side8 [* \$side8 1. ]
set temperature1 \$side1
set temperature2 \$side2
set length1 \$side3
set lengthx \$side4
set constant1 \$side5
set coefficient2 \$side6
set heat_flow [- [* \$coefficient2 [/ [- \$temperature2 \$temperature1 ] \$length1] ] \$constant1 ]
#set heat_flow [* \$coefficient2 [/ [- \$temperature2 \$temperature1 ] \$length1 ] ]
set side7 \$heat_flow
#set result1 [+ \$temperature1 [* [/ [- \$temperature2 \$temperature1 ] \$length1] \$lengthx ]]
set result1 [+ \$temperature1 [* [/ [- \$temperature2 \$temperature1 ] \$lengthx] \$length1 ]]
set side8 \$result1       }
proc fillup {aa bb cc dd ee ff gg hh} {
.frame.entry1 insert 0 "\$aa"
.frame.entry2 insert 0 "\$bb"
.frame.entry3 insert 0 "\$cc"
.frame.entry4 insert 0 "\$dd"
.frame.entry5 insert 0 "\$ee"
.frame.entry6 insert 0 "\$ff"
.frame.entry7 insert 0 "\$gg"
.frame.entry8 insert 0 "\$hh"
}
proc clearx {} {
foreach i {1 2 3 4 5 6 7 8 } {
.frame.entry\$i delete 0 end } }
proc reportx {} {
global side1 side2 side3 side4 side5
global side6 side7 side8
global testcase_number
console show;
puts "%|table \$testcase_number|printed in| tcl wiki format|% "
puts "&| quantity| value| comment, if any|& "
puts "&| testcase number:|\$testcase_number | |&"
puts "&| \$side1 :|initial temperature t1 degrees|   |&"
puts "&| \$side2 :|final temperature t2 degrees| |& "
puts "&| \$side3 :|length meters| |& "
puts "&| \$side4 :|boundary  length meters |      |&"
puts "&| \$side5 :|temperature constant|     |&"
puts "&| \$side6 :|temperature coefficient |  |&"
puts "&| \$side7 :|heat flux|  |&"
puts "&| \$side8 :|temperature degrees|  |&"
}
frame .buttons -bg aquamarine4
::ttk::button .calculator -text "Solve" -command { calculate   }
::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 150. 640.0 .3048 10.0  0.3 0.3 472. 164.09}
::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 100. 600.0 1.0 10.0   1.0  1.0 450.5 165.09 }
::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 120. 530.0 5.0 10.0   1.0 1.0  420.5 170.09 }
::ttk::button .clearallx -text clear -command {clearx }
::ttk::button .cons -text report -command { reportx }
::ttk::button .exit -text exit -command {exit}
pack  .clearallx .cons .about .exit .test4 .test3 .test2   -side bottom -in .buttons
grid .frame .buttons -sticky ns -pady {0 10}
. configure -background aquamarine4 -highlightcolor brown -relief raised -border 30
wm title . "One Dimensional Heat Flow Calculator"```

### Pushbutton Operation

For the push buttons, the recommended procedure is push testcase and fill frame, change first three entries etc, push solve, and then push report. Report allows copy and paste from console.

For testcases in a computer session, the eTCL calculator increments a new testcase number internally, eg. TC(1), TC(2) , TC(3) , TC(N). The testcase number is internal to the calculator and will not be printed until the report button is pushed for the current result numbers. The current result numbers will be cleared on the next solve button. The command { calculate; reportx } or { calculate ; reportx; clearx } can be added or changed to report automatically. Another wrinkle would be to print out the current text, delimiters, and numbers in a TCL wiki style table as
```  puts " %| testcase \$testcase_number | value| units |comment |%"
puts " &| volume| \$volume| cubic meters |based on length \$side1 and width \$side2   |&"  ```