| Notation | |
| A | Effectiveness area of membrane (m2) |
| CFV | Cross flow velocity (m·s−1) |
| daverage | Average droplet size of oil in the emulsion (µm) |
| di | Each oil droplet diameter size in the emulsion (µm) |
| L | Membrane thickness (m) |
| n | Dimensionless |
| PF | Permeation flux (L m−2 h−1) |
| rm | Mean pore radius of membrane (µm) |
| TMP | Transmembrane pressure (bar) |
| PTB | Pound per thousand barrels |
| T | Temperature (°C) |
| t | Time (minutes) |
| V | Volume of permeate (Liter) |
| VM | Volume of the membrane (m3) |
| W1 | Mass of dry membrane (gr) |
| W2 | Soaked membrane’s mass (gr) |
| Greek Letters | |
| ρm | Water density at the experiment’s temperature (kg m−3) |
| ε | Porosity of the membrane (dimensionless) |
| μ | Water viscosity at the operating temperature (Pa·s) |
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