What does a high Schmidt number mean?
Where the Schmidt number is small mass diffusion will dominate, whereas for high Schmidt numbers momentum diffusion will dominate. More specifically changes in the three key properties will have the following effects on Schmidt number: Increase in dynamic viscosity will increase Schmidt number.
What is the physical significance of the Schmidt number what is the heat transfer equivalent of this number What does SC 1 signify?
The Schmidt number corresponds to the Prandtl number in heat transfer. A Schmidt number of unity indicates that momentum and mass transfer by diffusion are comparable, and velocity and concentration boundary layers almost coincide with each other.
What is the physical significance of Peclet number?
The Peclet number is a measure of the relative importance of advection versus diffusion, where a large number indicates an advectively dominated distribution, and a small number indicates a diffuse flow.
What is the physical significance of the Lewis number?
The Lewis number is defined as the ratio of thermal diffusivity and mass diffusivity. It is used to characterize fluid flows where there is simultaneous heat and mass transfer. The Lewis number is therefore a measure of the relative thermal and concentration boundary layer thicknesses.
What is the physical significance of Sherwood number?
The Sherwood number is a dimensionless number, named after Thomas Kilgore Sherwood. The Sherwood number is defined as the ratio of the convective mass transfer to the mass diffusivity. The Nusselt and Sherwood numbers represent the effectiveness of heat and mass convection at the surface.
What is the value of the Schmidt number for water?
0.60
Explanation: Schmidt number of water is 0.60 while that of oxygen, ethyl alcohol and benzene are 0.75, 1.76 and 1.30 respectively.
What is the physical significance of the Sherwood number?
The Sherwood number (Sh) (also called the mass transfer Nusselt number) is a dimensionless number used in mass-transfer operation. It represents the ratio of the convective mass transfer to the rate of diffusive mass transport, and is named in honor of Thomas Kilgore Sherwood.
What is the significance of Graetz number?
This number is useful in determining the thermally developing flow entrance length in ducts. A Graetz number of approximately 1000 or less is the point at which flow would be considered thermally fully developed.
What is the significance of Grashof number?
The significance of the Grashof number is that it represents the ratio between the buoyancy force due to spatial variation in fluid density (caused by temperature differences) to the restraining force due to the viscosisty of the fluid.
What is the dimension of the Schmidt number?
What is the dimension of the Schmidt number? Explanation: Schmidt number = v/D and it has no dimensions.
How is Schmidt number calculated?
The Schmidt number (Sc) is the ratio of the kinematic viscosity to the molecular diffusion coefficient, i.e., Sc= v/Dm.
Which of the following is having the lowest value of Schmidt number?
4. Which one of the following is having the lowest value of Schmidt number? Explanation: Schmidt number of water is 0.60 while that of oxygen, ethyl alcohol and benzene are 0.75, 1.76 and 1.30 respectively. 5.