Interpretation: The power per meter of width between 2 horizontal flat plates is to be calculated for the lubricating oil.
Concept introduction: The power required per meter of width of flat plates is the product of the pressure drop between the plates and the flow rate of the oil.
P is the power required
q is the flow rate of the oil per meter of the width
The pressure drop across the plates is given as,
The notations used here are,
The average velocity here is given as,
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Unit Operations of Chemical Engineering
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