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Turbulent thermal diffusivity is a measure of how quickly heat is dispersed in a turbulent fluid flow. It quantifies the rate at which temperature fluctuations spread through the fluid due to turbulence, and is important in predicting heat transfer in turbulent flows.
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What are the thermal parameters?
Thermal parameters are characteristics that describe how heat is transferred in a material or system. These parameters include thermal conductivity, heat capacity, thermal diffusivity, and thermal resistance. They are important in determining how a material or system responds to changes in temperature.
If two bodies are in thermal equilibrium in one frame will they be in thermal equilibrium in all frames?
No, if two bodies are in thermal equilibrium in one frame, they will not necessarily be in thermal equilibrium in all frames. Thermal equilibrium depends on the balance of energy exchange between the bodies, which can vary with different frames of reference due to relative motion and time dilation effects.
Is the mass diffusivity of air in water vapour equal to that of water vapour in air?
No, the mass diffusivity of air in water vapor is different from the mass diffusivity of water vapor in air. The diffusivity of a substance in a medium depends on various factors such as temperature, pressure, and molecular weights of the substances involved, leading to different diffusion rates in different directions.
How do you find burning velocity?
Burning velocity is typically determined experimentally using a constant-volume combustion chamber where the rate of combustion of a fuel-air mixture is measured. The burning velocity can also be calculated using a formula involving the flame speed and the density of the unburned mixture. Additionally, numerical simulations can be used to predict burning velocity based on the chemical kinetics of the combustion process.
How do you carry out and interpret thermal tests?
To carry out a thermal test, you would typically subject the material or device to controlled temperature changes and measure its response (e.g., temperature changes, heat flow). Interpretation involves analyzing the data collected to understand the material's thermal properties, such as thermal conductivity, diffusivity, and specific heat capacity. This information can be used to assess the material's behavior under different thermal conditions and optimize its performance in various applications.
What is the physical significance of the thermal diffusivity and How is it defined and what?
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.
What is the thermal diffusivity of polypropylene?
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.
The ratio of thermal boundary layer thickness to the concentration boundary layer thickness is?
The ratio of thermal boundary layer thickness to the concentration boundary layer thickness is typically denoted as Prandtl Schmidt number (PrSc). It is defined as the ratio of thermal diffusivity to mass diffusivity of a fluid and represents the relative thicknesses of the thermal and concentration boundary layers in a flow field.
A dimensionless number which is a ratio of kinematics viscosity to thermal?
The ratio between the kinematic viscosity and the thermal diffusivity is called the Prandtl Number.
What has the author Anna Matvienko written?
Anna Matvienko has written: 'High-resolution measurements of thermal diffusivity of water-alcohol mixtures using a photopyroelectric thermal-wave cavity'
What has the author M di Marzo written?
M di Marzo has written: 'Transient cooling of a hot surface by droplets evaporation' -- subject(s): Experiments, Thermal analysis, Thermal diffusivity
What are the thermal parameters?
Thermal parameters are characteristics that describe how heat is transferred in a material or system. These parameters include thermal conductivity, heat capacity, thermal diffusivity, and thermal resistance. They are important in determining how a material or system responds to changes in temperature.
What are the transport properties of fluids?
Transport properties of fluids include viscosity, thermal conductivity, and diffusivity. Viscosity is a measure of a fluid's resistance to flow, thermal conductivity relates to the fluid's ability to conduct heat, and diffusivity describes how easily a substance can spread or diffuse within the fluid. These properties are important in various engineering applications, such as in fluid dynamics and heat transfer processes.
A dimensionless number which is a ratio of kinematics viscosity to thermal diffusivity is known as?
The dimensionless number that represents the ratio of kinematic viscosity to thermal diffusivity is called the Prandtl number. It is commonly used in fluid mechanics and heat transfer studies to characterize the relative importance of momentum and heat transfer in a fluid.
What has the author Ray H Cornell written?
Ray H. Cornell has written: 'Measuring thermal diffusivities of high epxlosives by the flash method' -- subject(s): Thermal diffusivity, Measurement, Explosives, Flash radiography
What has the author W K Sawyer written?
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
Diffusivity coefficient for toluene in air?
molecular diffusivity of toluene in the air is 8.14 × 10−6 m2/s
