Expert ForumsMixing

Topic: Re: Power estimation for turbulent and laminar mixing

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There is no simple rule of thumb for power estimation in either turbulent orlaminar mixing. Power depends on impeller type, number of blades, bladewidth but especially impeller diameter and rotational speed. Power isproportional to impeller diameter to the fifth power and rotational speedcubed for turbulent conditions. Power is proportional to impeller diametercubed and rotational speed squared for laminar conditions.
Turbulent and laminar conditions also depend on impeller diameter androtational speed, but as a rough estimate turbulent conditions probablyexist for viscosities less than 100 cp and laminar conditions forviscosities greater than 1,000,000 cp. Between turbulent and laminarconditions is a transition range.