| Parameter | Pneumatic (Air) | Hydraulic (Oil) | |---|---|---| | Density, (\rho) | 1.2 kg/m³ (≈ 20 % of liquid) | 850–900 kg/m³ | | Speed of sound, (c) | ≈ 340 m/s → compressibility effects | ≈ 1500 m/s (negligible compressibility) | | Typical (C_d) | 0.6–0.8 | 0.7–0.9 | | Viscosity, (\mu) | 18 µPa·s | 30–100 cP | | Flow regime | Often choked, sub‑sonic | Laminar/turbulent depending on pressure drop |
Instead of risking your hardware with a crack, consider these legitimate alternatives: | Parameter | Pneumatic (Air) | Hydraulic (Oil)
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3.4 Metrics
: Version 4.2 introduced elements for drawing and simulating GRAFCET diagrams , a standard for sequential function charts Art Systems Software GmbH Educational Features Didactic Materials