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Average Sherwood Number Formula:
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The Average Sherwood Number is a dimensionless number that represents the ratio of convective mass transfer to the rate of diffusive mass transport. It is used in mass transfer operations to characterize the efficiency of mass transfer in fluid systems.
The calculator uses the Average Sherwood Number formula for internal turbulent flow:
Where:
Explanation: This empirical correlation relates the Sherwood number to the Reynolds and Schmidt numbers for turbulent flow conditions in internal flows such as pipes and ducts.
Details: The Sherwood number is crucial for designing and analyzing mass transfer equipment such as absorbers, strippers, and mass exchangers. It helps predict mass transfer coefficients and optimize process efficiency.
Tips: Enter Reynolds Number and Schmidt Number as positive dimensionless values. Both values must be greater than zero for accurate calculation.
Q1: What is the range of validity for this correlation?
A: This correlation is typically valid for Reynolds numbers greater than 10,000 (turbulent flow) and Schmidt numbers between 0.6 and 3000.
Q2: How does the Sherwood number relate to the Nusselt number?
A: The Sherwood number is the mass transfer analog of the Nusselt number in heat transfer. Both represent the ratio of convective to diffusive transport.
Q3: What factors affect the Sherwood number?
A: Flow regime (laminar/turbulent), geometry, fluid properties, and boundary conditions all influence the Sherwood number value.
Q4: When is this correlation most applicable?
A: This specific correlation is most applicable for fully developed turbulent flow in smooth circular pipes with constant wall concentration.
Q5: Are there limitations to this equation?
A: This correlation may not be accurate for non-circular ducts, rough surfaces, or flows with significant entrance effects or developing boundary layers.