Issues creating SimpleAtmosphere

[morripau]

Describe the bug
When trying to create a simple atmosphere I receive an error that states:
ERROR: UndefVarError: SimpleAtmosphere not defined in Main

To Reproduce
Below is the code I'm running as a test:

using GasDispersion
s = SimpleAtmosphere()

Expected behavior
I expect to not receive this error. Other functionality has worked just fine. For example I was able to create a substance. The code below works just fine for me:

using GasDispersion

chem = Substance(
name="sarin",
gas_density = (101325 * 0.140093) / (8.314 * 273.15),
liquid_density=1094.3,
boiling_temp=420.0,
latent_heat=262682.27,
gas_heat_capacity=1271.318,
liquid_heat_capacity=1584.517
)

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Windows 11 Home
• Browser: I'm running a .jl file in VS code. I've also tried running this in a Pluto notebook in chrome.
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
I've tried the following:
GasDispersion.SimpleAtmosphere(), this doesn't work.

I've also tried manually locating the simple_atmosphere.jl src file, and running it by using an include statement:
atmos = include("simple_atmosphere.jl src file path") but then I receive the following error:

LoadError: UndefVarError: DIPPRVaporPressure not defined in Main.var"workspace#34"

[aefarrell]

Sorry, I was on vacation when you submitted this, and haven't had a chance to look at it until now. I am mystified. SimpleAtmosphere is exported and this exact case is being tested in the doc tests. It also works fine on my (linux) machine both at the REPL and in a Pluto notebook, e.g.

julia> using GasDispersion

julia> pkgversion(GasDispersion)
v"0.3.0"

julia> s = SimpleAtmosphere()
SimpleAtmosphere atmosphere:
    P: 101325.0 Pa 
    T: 298.15 K 
    u: 1.5 m/s 
    h: 10.0 m 
    rh: 0.0 % 
    stability: ClassF  

What version of julia are you using? Have you tried creating a scenario using the scenario_builder helper function? That also creates a SimpleAtmosphere in the background and if it creates an error that might help me track it down.

This might be a Windows compatibility issue, which may take some time for me to figure out as I don't use Windows.

As for why going straight to the source file ( include("simple_atmosphere.jl src file path") ) didn't work, that is because it uses an internal model for the vapour pressure of water (for relative humidity) which isn't exported. So that error makes sense at least.

[morripau]

Hi, thanks for responding.

The version of Julia: Version 1.11.4 (2025-03-10)...
However, as I'm typing this I realized there's a 1.11.5 which I just installed and updated all my libraries. However:

Although I was able to get scenario_builder to work. It would only work if I left out the atmosphere input (which defeats my purpose as I need to control atmospheric parameters for the problem I'm working on).

[morripau]

I have a Linux and a Mac, so I'll probably try this on those as well when I find time. Thanks again.

[aefarrell]

That scenario_builder works is even more confusing, when you call it without supplying at atmosphere it just uses SimpleAtmosphere() as the default

scenario_builder(s,m; kwargs...) = scenario_builder(s,m,SimpleAtmosphere(); kwargs...)

Since it works, that implies that all of the code is working inside the module but it is not exporting properly. I'm going to have to spend some time googling to see what this could be.

[aefarrell]

I added windows and Mac to the automated tests run on github -- previously I had them run only on ubuntu and assumed they would work for every OS. All of the unit tests passed on windows, so this could be a local environment issue, and I don't really know how to help 😞

[morripau]

Ok, no worries. I'm going to try on different computers/OS.