Ethylene Ethene Acetene C2H4 Dynamic Kinematic Viscosity Temperature Pressure

Reference data and engineering information about ethylene ethene acetene c2h4 dynamic kinematic viscosity temperature pressure for fluid mechanics applications.

ethyleneetheneaceteneC2H4Data Table

Overview

Engineering reference data for Ethylene Ethene Acetene C2H4 Dynamic Kinematic Viscosity Temperature Pressure in fluid mechanics.

Key Formulas

Reynolds Number

$Re = \frac{\rho v D}{\mu}$

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

$P + \frac{1}{2}\rho v^2 + \rho g h = \text{const}$

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

$A_1 v_1 = A_2 v_2$

Conservation of mass for incompressible flow.

Darcy-Weisbach

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Pressure drop due to friction in a pipe.

Variables

Symbol	Description	Unit
$Re$	Reynolds number	—
$\rho$	Fluid density	kg/m³
$v$	Flow velocity	m/s
$D$	Characteristic dimension	m
$\mu$	Dynamic viscosity	Pa·s
$P$	Pressure	Pa
$f$	Darcy friction factor	—

Ethylene (ethene, C₂H₄) exhibits distinct viscosity behavior between its liquid and gas phases. The atmospheric boiling point of ethylene is -104 °C (-155 °F), which corresponds to a significant shift in viscosity at that temperature.

38 rows

Dynamic and kinematic viscosity of ethylene at gas-liquid equilibrium pressure
State	Temperature(K)	Temperature(°C)	Pressure(bara)	Dynamic Viscosity(μPa·s)	Kinematic Viscosity(cSt)
Liquid	103.99	-169.16	0.00122	685.7	1.048
Liquid	105	-168	0.00146	662.5	1.014
Liquid	115	-158	0.00697	488.1	0.762
Liquid	125	-148	0.0253	378.7	0.6033
Liquid	135	-138	0.0739	305.5	0.4971
Liquid	145	-128	0.183	253.8	0.4221
Liquid	155	-118	0.398	215.7	0.367
Liquid	165	-108	0.777	186.4	0.3248
Liquid	175	-98.2	1.39	163	0.2913
Liquid	185	-88.2	2.33	143.9	0.2642
Liquid	195	-78.2	3.69	127.7	0.2413
Liquid	205	-68.2	5.56	113.8	0.2218
Liquid	215	-58.2	8.05	101.4	0.2045
Liquid	225	-48.2	11.3	90.22	0.1891
Liquid	235	-38.2	15.3	79.89	0.1748
Liquid	245	-28.2	20.4	70.14	0.1614
Liquid	255	-18.2	26.5	60.69	0.1486
Liquid	265	-8.1	33.9	51.11	0.1358
Liquid	275	1.9	42.8	40.4	0.1221
Gas	103.99	-169.16	0.00122	0.773	195.2
Gas	105	-168.2	0.00146	1.001	213.8
Gas	115	-158.2	0.00697	2.734	133.5
Gas	125	-148.2	0.0253	3.826	55.98
Gas	135	-138.2	0.0739	4.558	24.55
Gas	145	-128.2	0.183	5.089	11.83
Gas	155	-118.2	0.398	5.511	6.261
Gas	165	-108.2	0.777	5.88	3.599
Gas	175	-98.2	1.39	6.228	2.22
Gas	185	-88.2	2.33	6.577	1.452
Gas	195	-78.2	3.69	6.941	0.9976
Gas	205	-68.2	5.56	7.334	0.7136
Gas	215	-58.2	8.05	7.769	0.5278
Gas	225	-48.2	11.3	8.261	0.4013
Gas	235	-38.2	15.3	8.834	0.312
Gas	245	-28.2	20.4	9.525	0.247
Gas	255	-18.2	26.5	10.4	0.198
Gas	265	-8.1	33.9	11.63	0.1602
Gas	275	1.9	42.8	13.77	0.1294

Source: engineeringtoolbox.com

Viscosity Trends

Liquid ethylene: Dynamic viscosity decreases with increasing temperature — from 685.7 μPa·s at 104 K to 40.40 μPa·s at 275 K. This is characteristic of liquids, where higher thermal energy reduces intermolecular resistance to flow.

Gaseous ethylene: Dynamic viscosity increases with increasing temperature — from 0.773 μPa·s at 104 K to 13.77 μPa·s at 275 K. This behavior is typical for gases, where higher molecular velocities enhance momentum transfer between layers.

Dynamic Viscosity Unit Conversions

The following conversions are commonly used when working with ethylene viscosity data:

Unit	Equivalent
1 cP (centipoise)	0.001 Pa·s = 0.01 P = 0.01 g/(cm·s) = 6.72197×10⁻⁴ lb/(ft·s) = 2.4191 lb/(ft·h)
1 lb/(ft·h)	0.00027778 lb/(ft·s) = 0.00041338 Pa·s = 0.0041338 P = 0.41338 cP
1 lb/(ft·s)	3600 lb/(ft·h) = 1.48816 Pa·s = 14.8816 P = 1488.16 cP
1 kg/(m·s)	1 Pa·s = 1 (N·s)/m² = 10 P = 1000 cP = 0.672197 lb/(ft·s) = 2419.09 lb/(ft·h)

Kinematic Viscosity Unit Conversions

Unit	Equivalent
1 cm²/s	1 St (Stokes) = 100 cSt = 1×10⁻⁴ m²/s = 1.07639×10⁻³ ft²/s
1 cSt (centistokes)	1 mm²/s = 1×10⁻⁶ m²/s = 1.07639×10⁻⁵ ft²/s
1 ft²/s	3600 ft²/h = 0.09290304 m²/s = 92903.04 cSt
1 ft²/h	2.7778×10⁻⁴ ft²/s = 2.58064×10⁻⁵ m²/s = 25.8064 cSt

For a complete understanding of ethylene thermophysical behavior, refer to the following companion pages:

Density and Specific Weight — varies significantly near the boiling point
Specific Heat (Heat Capacity) — temperature-dependent energy storage
Thermal Conductivity — heat transfer characteristics

Interactive Charts

Ethylene dynamic viscosity pressure C

References

Original Source

Source: engineeringtoolbox.com