Ammonia  Prandtl Number vs. Temperature and Pressure
Figures and table with changes in Prandtl number for ammonia with changes in temperature and pressure.
The Prandtl Number  Pr  is a dimensionless number approximating the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity  and is often used in heat transfer and free and forced convection calculations.
The Prandtl number can for calculations be expressed as
Pr = μ C_{p} / k (1)
where
μ = absolute or dynamic viscosity (kg/m s, lb_{m}/(ft h))
C_{p} = specific heat (J/kg K, Btu/(lb_{m}^{o}F))
k = thermal conductivity (W/m K, Btu/(h ft^{2}^{o}F/ft))
Below, Prandtl numbers for ammonia at varying temperatures and pressures are given in figures and table.
See also other properties of Ammonia at varying temperature and pressure: Density and specific weight, Dynamic and kinematic viscosity, Prandtl Number, Properties at GasLiquid Equilibrium pressure, Specific Heat (Heat Capacity) and Thermal Conductivity, and Thermophysical properties at standard conditions and Vapour pressure at gasliquid equilibrium,
as well as Prandtl number of Air, Carbon dioxide, Methane, Nitrogen, Propane and Water.
Ammonia Prandtl number at gasliquid equilibrium pressure, temperature given as °C or °F:
Ammonia Prandtl number at atmospheric pressure, temperature given as °C:
Ammonia Prandtl number at varying temperatures at given constant pressures, SI and Imperial units:
Back to top
Ammonia Prandtl number at given temperatures and 1, 10, 50 and 100 bara presure:
Temperature  Prandtl number at given pressures  
[K]  [°C]  [°F]  1 bara  10 bara  50 bara  100 bara 
200  73.2  8.6  2.67  2.67  2.69  2.72 
239.56  33.6  13.3  1.71(liq)  
239.56  33.6  13.3  0.881(g)  
298.05  24.9  45.8  1.30 (liq)  
298.05  24.9  45.8  1.18 (g)  
300  26.9  46.9  0.876  1.16  1.29  1.29 
362.03  88.9  81.4  1.41 (liq)  
362.03  88.9  81.4  1.84 (g)  
398.32  125  102  3.59 (liq)  
398.32  125  102  4.85 (g)  
400  127  102  0.857  0.894  1.11  3.24 
500  227  158  0.835  0.846  0.903  0.998 
600  327  214  0.855  0.860  0.883  0.913 
700  427  269  0.952  0.955  0.965  0.976 
Related Topics

Fluid Mechanics
The study of fluids  liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time. 
Material Properties
Material properties of gases, fluids and solids  densities, specific heats, viscosities and more. 
Thermodynamics
Work, heat and energy systems.
Related Documents

Air  Prandtl Number
Prandtl number for air vs. temperature and pressure. 
Ammonia  NH_{3}  Concentration in Air and Health Effects
Ammonia and health symptoms  smell and threat to life. 
Ammonia  NH_{3}  Thermodynamic Properties
Thermodynamic properties of saturated and superheated ammonia R717 like specific volume, enthalpy and entropy. 
Ammonia  Dynamic and Kinematic Viscosity vs. Temperature and Pressure
Online calculator, figures and tables showing dynamic (absolute) and kinematic viscosity of gasous and liquid ammonia at temperatures ranging from 73 to 425°C (100 to 800°F) at pressure ranging from 1 to 1000 bara (14.5  14500 psia)  SI and Imperial Units. 
Ammonia  Properties at GasLiquid Equilibrium Conditions
Figures and tables showing how the properties of liquid and gaseous ammonia changes along the boiling/condensation curve (temperature and pressure between triple point and critical point conditions). An ammonia phase diagram are included. 
Ammonia  Specific Heat vs. Temperature and Pressure
Online calculator, figures and tables showing specific heat, C_{P} and C_{V}, of gasous and liquid ammonia at temperatures ranging from 73 to 425°C (100 to 800°F) at pressure ranging from 1 to 100 bara (14.5  1450 psia)  SI and Imperial Units. 
Ammonia  Thermal Conductivity vs. Temperature and Pressure
Online calculator, figures and tables showing thermal conductivity of liquid and gaseous ammonia at temperatures ranging 70 to 425 °C (100 to 800 °F) at atmospheric and higher pressure  Imperial and SI Units. 
Ammonia  Thermophysical Properties
Chemical, Physical and Thermal Properties of Ammonia. Phase diagram included. 
Ammonia  Vapour Pressure at GasLiquid Equilibrium
Figures and table with ammonia saturation pressure at boiling points, SI and Imperial units. 
Carbon dioxide  Prandtl Number vs. Temperature and Pressure
Figures and table with changes in Prandtl number for carbon dioxide with changes in temperature and pressure. 
Conductive Heat Transfer
Conductive heat transfer takes place in a solid if there is a temperature gradient. 
Heat, Work and Energy
Heat vs. work vs. energy. 
Liquid Ammonia  Thermal Properties at Saturation Pressure
Density, specific heat, thermal conductivity, viscosity and Prandtls no. of liquid ammonia at saturation pressure. 
Methane  Prandtl number vs. Temperature
Figures and table showing changes in Prandtl number for methane with changes in temperature and pressure. 
Nitrogen  Prandtl number vs. Temperature and Pressure
Figures and tables showing Prandtl number of nitrogen at varying temperarure and pressure, SI and Imperial units. 
Prandtl Number
A dimensionless number approximating the ratio of momentum diffusivity to thermal diffusivity. 
Propane  Prandtl Number vs. Temperature and Pressure
Figures and tables with Prandtl Number of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units. 
Propane  Thermal Diffusivity vs. Temperature and Pressure
Figures and tables showing thermal diffusivity of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units. 
Solubility of Gases in Water vs. Temperature
Solubility of Ammonia, Argon, Carbon Dioxide, Carbon Monoxide, Chlorine, Ethane, Ethylene, Helium, Hydrogen, Hydrogen Sulfide, Methane, Nitrogen, Oxygen and Sulfur Dioxide in water. 
Viscosity  Absolute (Dynamic) vs. Kinematic
Vicosity is a fluid's resistance to flow and can be valued as dynamic (absolute) or kinematic.