# heat conduction in a rod

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 July 27, 2001, 06:30 heat conduction in a rod #1 98.4F Guest   Posts: n/a Hello everyone When writing the program for heat conduction in a rod what is the difference between dimensional temperature and nondimensional temperature? Dimensional temperature is taken as 100*nondimensional temperature. Thanks

 July 27, 2001, 15:42 Re: heat conduction in a rod #2 NAME Guest   Posts: n/a ? sounds to me you just answered your own question

 July 29, 2001, 23:30 Re: heat conduction in a rod #3 98.4F Guest   Posts: n/a Hi name But what is the significance of taking nondimensional temperature first and then taking dimensional temperature? Regards

 July 30, 2001, 16:47 Re: heat conduction in a rod #4 NAME Guest   Posts: n/a Maybe I'm missing the point but one reason you non-dimensionalize a numerical problem (say between a range of 0-1) is to help minimize numerical errors. After the computation is complete you put the dimensions back in to get a physical answer

 July 31, 2001, 03:37 Re: heat conduction in a rod #5 John C. Chien Guest   Posts: n/a (1). Dimensional temperature gives you only "one" number. (2). On the other hand, dimensionless temperature gives you "two" numbers. One is the reference temperature, and the other one is the dimensionless temperature. (3). Example: analog clock is dimensionless. So, you can tell the time easily by looking at the positions of hour hand and minute hand. Digital clock is much harder to read, because you will have to read all digits first and then try to make sense out of these numbers. (4). That's why, most of us are now using analog clocks instead of the digital clocks.