Centrifuge G-Force (RCF) & Decanter Sigma Calculator
Calculate industrial centrifuge Relative Centrifugal Force (RCF), bowl rim speed, settling acceleration factor, and the Ambler Sigma factor for scale-up.
Centrifuge Dimensions & Speed
Feed Slurry & Throughput
Centrifugal Field & Scaling
Recommended Tools & Equipment
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Frequently Asked Questions
What is the Ambler Sigma (Σ) factor and why is it essential for centrifuge scale-up?
The Sigma factor encapsulates the centrifugal acceleration and geometric settling volume of a centrifuge into a single equivalent area parameter. It represents the physical area an unaccelerated gravity settling clarifier would need to match the centrifuge separation performance. Two different decanters with the same Q/Σ ratio will achieve identical cut points.
How does bowl rim speed limit maximum operating RPM?
Mechanical hoop stress in the rotating stainless steel or duplex alloy bowl shell scales with the square of rim velocity (stress ~ v_rim² ~ r² * ω²). Industrial decanters typically cap rim speeds at 300 to 450 ft/s (90-140 m/s) to prevent catastrophic burst failure.
How does adjusting the decanter liquid pool depth affect cake dryness vs liquid clarity?
A deep liquid pool increases residence time and improves centrate clarity by capturing finer particles. However, it shortens the dry beach drainage zone on the conical end of the bowl, resulting in wetter cake discharge. A shallow pool produces drier cake but higher solids carryover in the overflow.