Tina Düren

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Department of Chemical Engineering, University of Bath

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Music Tutorial - The molecule molecule file

This file describes the interaction between pairs of molecules, i.e. Methane - Methane, Methane - IRMOF1 and IRMOF1 - IRMOF1 in our example. The following example is specific for the map creation. In the molecule - molecule file of your GCMC simulation, you will specify that you want to use a pmap for the Methane - IRMOF1 interaction.

The general form is a follows where each of the keyword column describes differnt options:

 
Molecule1     Molecule2     COUL/          MAP/     OFF
Molecule1     Molecule2     NCOUL/       BASIC/         LJ/      MAP/           OFF

The meaning of the keywords is as follows:

COUL: Columbic interactions
NCOUL: non-Columbic interactions
BASIC: Does a brute force pairwise calculation. The name of the potential model (LJ for Lennard Jonnes in this case) to be used must be specified in the next column if you use this keyword.
MAP: Uses a map to get the potential and forces by interpolating from the pretabulated potential map. For the coulombic case its does the hermite interpolation from an emap file.
OFF: No interaction

The molecule - molecule file for the Methane - IRMOF1 potential map caluclation should look like this:

  
Methane		Methane		COUL	OFF   
Methane		Methane		NCOUL	BASIC	LJ  

IRMOF1		Methane		NCOUL	BASIC	LJ	FAST  
IRMOF1		Methane		COUL	OFF

IRMOF1		IRMOF1		NCOUL	OFF
IRMOF1		IRMOF1		COUL	OFF

Example of a MOLECULE-MOLECULE INTERACTION FILE

Department of Chemical Engineering, University of Bath
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