Cosmo-rs Tutorial [FHD 2027]

from cosmors import COSMORS from cosmors.io import load_cosmo_file water_sigma = load_cosmo_file("water.sigma") ethanol_sigma = load_cosmo_file("ethanol.sigma") Initialize with default parameters cr = COSMORS(mixture=[water_sigma, ethanol_sigma], mole_fractions=[0.3, 0.7], temperature=298.15) Calculate activity coefficients gamma = cr.activity_coefficients() print(f"Gamma water: gamma[0]:.3f, Gamma ethanol: gamma[1]:.3f") Predict VLE (simplified) p_vap = cr.vapor_pressures() print(f"Partial pressures: p_vap")

If you need a specific example script for your molecule or property, let me know – I can generate an extended case study. cosmo-rs tutorial

Install:

pip install cosmors Example script to predict activity coefficients: from cosmors import COSMORS from cosmors

: Use the same level of theory (e.g., BP86/TZVP) and a conductor-like screening (ε = ∞) for all molecules. 4. Step 2: Prepare Input for COSMOtherm Create a project folder. Copy all .cosmo files (e.g., water.cosmo , ethanol.cosmo , benzene.cosmo ). 4.1 Create parameter file ( BP_TZVP_C30_1701.ctd example) COSMOtherm comes with pre-parameterized files. Choose based on your DFT level. 4.2 Create mixture definition file ( .inp ) Example: VLE of ethanol + water at 1 bar Step 2: Prepare Input for COSMOtherm Create a project folder

Input: