): Ensure the calculated bulk fluid turnover rate aligns with the required process blend time ( Verify that
This is where the spreadsheet performs its primary work.
Identify the goal (e.g., blending, solids suspension, gas dispersion). Characterize Fluids: Gather viscosity, density, and solid content. Select Impeller:
does not exceed shear limits for shear-sensitive products (e.g., polymers, crystals). agitator design calculation xls repack
) must always sit safely away from the critical speed. Standard industrial practices mandate that the operating speed should not exceed (
Are you designing for a specific application, like or liquid blending ? I can provide the exact Power Numbers ( Npcap N sub p
): Critical for determining power draw and mass-based pumping rates. Dynamic Viscosity ( ): Ensure the calculated bulk fluid turnover rate
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This final step ensures the agitator can be built safely.
wide) unless evaluating high-viscosity laminar systems where baffles are omitted. Select Impeller: does not exceed shear limits for
The repack outputs a one-page dashboard containing:
Set up your Excel cells to automatically compute these values: Reynolds Number ( cap N sub cap R e end-sub : Determines if the flow is laminar or turbulent. is agitator speed in revolutions per second ( Power Requirement ( cap N sub p
Modern industrial mixing relies heavily on tools, often distributed as Excel (XLS) spreadsheets or "repacked" software packages, to bridge the gap between complex fluid dynamics and practical mechanical engineering . These calculations are vital for ensuring process efficiency, equipment longevity, and energy conservation across industries ranging from pharmaceuticals to petrochemicals. Core Principles of Agitator Design
Need a specific template? Comment below or reach out for a curated list of verified agitator spreadsheets (no malware, no broken links).