Thermal diffusivity signifies the rate of heat transfer into the solid. If it is higher then less time is required for the heat to penetrate into the solid. it is th property of a solid. If we know the mass density,specific heat and thermal conductivity coefficient then we can determine its thermal diffusivity.
Thermal diffusivity is the density divided by the specific heat of a substance. The TD of polypropylene is around 0.096 meters squared per second.
Lewis No = thermal diffusivity / mass diffusivity .So, NLe = thermal boundary layer thickness/ Concentration boundary layer thickness
The ratio between the kinematic viscosity and the thermal diffusivity is called the Prandtl Number.
No., because thermal property like conductivity, diffusivity of two material my not be same in other medium.
The definition of thermal conduction is heat transfer. Thermal conduction is when heat is transferred from one source to another.
Anna Matvienko has written: 'High-resolution measurements of thermal diffusivity of water-alcohol mixtures using a photopyroelectric thermal-wave cavity'
M di Marzo has written: 'Transient cooling of a hot surface by droplets evaporation' -- subject(s): Experiments, Thermal analysis, Thermal diffusivity
The Prandtl Number is a dimensionless number approximating the ratio of momentum diffusivity (kinematic viscosity) and thermal diffusivity and can be expressed asPr = v / αThe Prandtl number can alternatively be expressed asPr = μ cp / kThe Prandtl Number is often used in heat transfer and free and forced convection calculations. where:ν : kinematic viscosity, ν = μ / ρ, (SI units : m2/s)α : thermal diffusivity, α = k / (ρcp), (SI units : m2/s)μ : dynamic viscosity, (SI units : Pa s)k: thermal conductivity, (SI units : W/(m K) )cp : specific heat, (SI units : J/(kg K) )ρ : density, (SI units : kg/m3 ).answered by : eng_moom
Ray H. Cornell has written: 'Measuring thermal diffusivities of high epxlosives by the flash method' -- subject(s): Thermal diffusivity, Measurement, Explosives, Flash radiography
W. K Sawyer has written: 'Addendum to a diffusivity model for fluid flow and heat conduction in porous media (MERC/SP-77/2)' -- subject(s): Mathematical models, Oil wells, Thermal diffusivity, Hydraulic fracturing
Thermal conductivity is a Physical property
Thermal conductivity is a Physical property