Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 3 (Q.No. 50)
50.
The ratio of kinematic viscosity to thermal diffusivity is called the __________ number.
Discussion:
2 comments Page 1 of 1.
Thosin said:
11 months ago
Kinematic viscosity = dynamic viscosity/density (u/e),
Thermal diffusivity = k/ecp,
Hence, thermal diffusivity/kinematic viscosity.
= u/e /k/ecp.
= u/e x ecp/k,
= ucp/k.
Thermal diffusivity = k/ecp,
Hence, thermal diffusivity/kinematic viscosity.
= u/e /k/ecp.
= u/e x ecp/k,
= ucp/k.
Bala said:
6 years ago
Prandtl number is the ratio of the momentum diffusivity (kinematic viscosity) to the thermal diffusivity.
(1)
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