Particle count conservation

Hi there,

comparing two calculations of similar models with different results using Molflow+, I was looking at the count of hits, desorptions, absorptions and reflections, in this case both models had surfaces only with sticking factor 1 or 0. In both cases several faces with sticking factor 1 for example had different amount of hits and absorptions, below some examples:

Also for sticking factor 0 the same happens:

grafik

I would expect that for sticking factor 1 the absorptions would equal the number of hits, and similarly, that for sticking factor 0 the reflections would be equal to hits. For me the way Molflow is behaving means that the particle amount is not conserved during the simulations, meaning that with the interaction with surfaces some particles may appear or disappear.

Is this the normal or expected behavior of Molflow+ or am I (or my college) doing something wrong?

Molflow conserves the particle count. You can check in the formula editor, with formulas like “H5-A5” or “R5-H5”, which are always 0. If not, let us know, and attach please a minimal example. Your screenshot doesn’t seem to be from Molflow, so I assume clipboard copy or your sheet editor rounded values.

Hi,

thanks for the reply! It is data from Molflow, but I pasted it on an Excel spreadsheet. Indeed, if I use the formula editor the “H5-A5” will result in zero. But in the values that I copied from the GUI into Excel it doesn’t, so maybe doing so am I copying the not values but the text displayed:

Yes, OS treats clipboard as text, exactly as displayed, unfortunately.

For more precise copy, use Facet Details tools, or the XML interface (in Python Python interface for MolFlow files - MolFlow / SynRad documentation )

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