What is Sherwood number formula?
Table of Contents
What is Sherwood number formula?
where Sh is the Sherwood number, defined as Sh = kL dB/ D, where D is the diffusivity of the dissolved gas in the liquid and which can be estimated.
What do you mean by 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. It is defined as follows.
How do you derive Sherwood number?
Formula
- Sherwood Number : Sh = kl/D.
- Mass Transfer Coefficient : k = ShD/L.
- Characteristic Length : L = ShD/k.
- Diffusion Coefficient : D = kl/Sh.
- Where, Sh = Sherwood Number, k = Mass Transfer Coefficient, L = Characteristic Length, D = Diffusion Coefficient.
What is the relation between Nusselt number and Reynolds number?
In turbulent flow, the boundary layer gets thinner as Reynolds number increases in the same pipe, thus, the Nusselt number depends on Reynolds number.
What is Schmidt number & Sherwood number?
Sherwood number represents the ratio between mass transfer by convection (β) and mass transfer by diffusion (δ/L). It is the mass transfer equivalent of Nusselt Number, Nu, and is a function of Reynolds Number, Re, and Schmidt Number, Sc.
Where is Nusselt number in Reynolds number?
Nusselt number calculator uses Nusselt Number = 0.37*Reynolds Number^0.6 to calculate the Nusselt Number, The Nusselt number formula is defined as the ratio of convective to conductive heat transfer across a boundary.
What is the difference between turbulent and laminar flow?
Laminar flows are smooth and streamlined, whereas turbulent flows are irregular and chaotic. A low Reynolds number indicates laminar flow while a high Reynolds number indicates turbulent flow. The flow behavior drastically changes if it is laminar vs. turbulent.
What is meant by Reynolds number?
Reynolds number is a dimensionless quantity that is used to determine the type of flow pattern as laminar or turbulent while flowing through a pipe. Reynolds number is defined by the ratio of inertial forces to that of viscous forces.
What is Schmidt number used for?
The Schmidt number is a dimensionless number defined as the ratio of momentum diffusivity (kinematic viscosity) and mass diffusivity, and is used to characterize fluid flows in which there are simultaneous momentum and mass diffusion convection processes.
What is Prandtl number used for?
The Prandtl number is an example of a dimensionless number that is an intrinsic property of a fluid. Fluids with small Prandtl numbers are free-flowing liquids with high thermal conductivity and are therefore a good choice for heat conducting liquids.
What is Reynolds number for turbulent flow?
Whenever the Reynolds number is less than about 2,000, flow in a pipe is generally laminar, whereas, at values greater than 2,000, flow is usually turbulent.
