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BG_78187041-Visitor
1-Visitor
March 5, 2021
Solved

Values being undefined/needing scalar

  • March 5, 2021
  • 2 replies
  • 1546 views

I'm working on modifying a program I am using for iteration in regards to some compressible/thermodynamics topics. I'm now modifying some isentropic relations to account for a Mach variable, but my sheet goes haywire with unitless declarations and "value must be scalar". I've attached both sheets below for comparison to how it should run and then what I want to do. Any immediate help would be appreciated.Screenshot (281).png

Best answer by LucMeekes

You define the p.t function with two parameters (gamma and M).

When you call it to define pt, you supply only one parameter.

Same for T.t

 

Correct that and see what happens.

 

Success!
Luc

 

 

2 replies

L
LucMeekes23-Emerald IVAnswer
23-Emerald IV
March 5, 2021

You define the p.t function with two parameters (gamma and M).

When you call it to define pt, you supply only one parameter.

Same for T.t

 

Correct that and see what happens.

 

Success!
Luc

 

 

W
Werner_E25-Diamond I
25-Diamond I
March 5, 2021

As far as I see from the pic you defined T.t and p.t as functions with two arguments but you only call them with on single argument. The result of doing so is a function, not a scalar value.

See the difference:

Werner_E_0-1614968706911.png

 

Solutions: Either define those function with just one argument and it will use the formerly defined value of M, OR if you want to keep M variable in future usages of the functions, you call the functions with both arguments when you use them later.

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