Hydraulics2D

Properties of Fluids - Theory & Concepts

Fundamental properties of fluids including density, specific weight, specific gravity, viscosity, surface tension, and compressibility.

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Fluid Properties Explorer

Representative properties near 20°C. Actual values vary with temperature, composition, and surface condition.

Newtonian reference fluid

Capillary diameter (

d

)2.0 mm

Moving-plate speed (

U

)0.50 m/s

Capillary rise in a clean glass tube

h=4\sigma\cos\theta/(\gamma d)

14.9 mm

The calculation neglects tube contamination, dynamic contact-angle hysteresis, evaporation, and the finite size of the surrounding reservoir.

Newtonian Couette flow

Shear rate, $du/dy$: 100 s⁻¹
Shear stress, $\tau=\mu U/y$: 0.100 Pa

The relation assumes steady, laminar, isothermal flow of a Newtonian fluid, no slip at both plates, negligible pressure gradient, and a uniform 5 mm gap.

Density

998 kg/m³

Specific weight

9.79 kN/m³

Dynamic viscosity

0.00100 Pa·s

Kinematic viscosity

1.00e-6 m²/s

Hydrostatics: Pressure & Manometry - Theory & Concepts - Manometer Hydrostatics: Forces on Surfaces - Theory & Concepts - Hydrostatic Force Relative Equilibrium of Liquids - Theory & Concepts Fluid Dynamics: Energy & Momentum - Theory & Concepts - Bernoulli

Fluid Properties Explorer

Capillary rise in a clean glass tube

Newtonian Couette flow

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