Tip speed dictates the shear rate at the outer edge of the blade. This is a critical metric for shear-sensitive products.
The XLS automatically flags the regime:
d=(16π⋅τall⋅M2+Tq2)1/3d equals open paren the fraction with numerator 16 and denominator pi center dot tau sub a l l end-sub end-fraction center dot the square root of cap M squared plus cap T sub q squared end-root close paren raised to the 1 / 3 power τalltau sub a l l end-sub
If you are currently building or troubleshooting your mixing workbook, I can help you write the exact syntax for your formulas. Let me know: What you are deploying? agitator design calculation xls
Re=ρ⋅N⋅D2μcap R e equals the fraction with numerator rho center dot cap N center dot cap D squared and denominator mu end-fraction = Fluid density ( = Agitator speed ( = Impeller diameter ( = Dynamic viscosity ( Power Consumption (
Selection menu for impeller type (Rushton, PBT, hydrofoil) and diameter ratio ( Calculation Module: Reynolds number, Power number ( Npcap N sub p ), Torque, and Power ( ) calculation. Results & Validation: Checks if the power-per-volume (
Re=ρ⋅N⋅D2μcap R e equals the fraction with numerator rho center dot cap N center dot cap D squared and denominator mu end-fraction : Laminar flow. : Turbulent flow. Step 2: Determine Power Number ( Npcap N sub p Tip speed dictates the shear rate at the
Easily select the right agitator type for the process fluid viscosity.
): This is a dimensionless constant specific to your impeller type, often found in lookup tables or generic curves. Calculate the actual shaft power.
To prevent catastrophic mechanical resonance, the operational speed ( Let me know: What you are deploying
IF(Re > 10000, "Turbulent", IF(Re < 10, "Laminar", "Transitional")) Step 2: Calculate Power Consumption (
Re=N⋅D2⋅ρμcap R e equals the fraction with numerator cap N center dot cap D squared center dot rho and denominator mu end-fraction Where: = Speed (rps), = Impeller diameter (m) B. Power Number Calculation ( Npcap N sub p Npcap N sub p depends on the impeller type and . For turbulent regimes, Npcap N sub p
vt=π⋅N⋅Dv sub t equals pi center dot cap N center dot cap D (e.g., crystallization, blending) Medium Shear: (e.g., heat transfer, gas dispersion) High Shear: (e.g., emulsification) Step 3: Power Consumption Calculation (
An spreadsheet serves as a powerful, time-saving tool for process engineers. It automates complex engineering equations, ensures design consistency, and accelerates the optimization of mixing systems. 1. Core Objectives of Agitator Design
kgm3the fraction with numerator k g and denominator m cubed end-fraction