Agitator Design Calculation Pdf Download Verified 'link' Access

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Application: Mixing of a Newtonian fluid with a viscosity of 1000 cP and a density of 1000 kg/m³ in a tank with a diameter of 1.5 m and a height of 2 m. agitator design calculation pdf download verified

ds = 0.05 to 0.1 * d

5. Special Cases & Corrections

• Non-Newtonian fluids: Use apparent viscosity (η) at impeller shear rate ( \dot\gamma = k_s N ) (k_s ≈ 10–13 for turbines).
• Gas dispersion: Power drops significantly (use gas sparged power number ~0.5–0.7 of ungassed).
• Solid suspension: Just-suspended speed ( N_js ) from Zwietering correlation.

In the world of chemical processing, pharmaceuticals, wastewater treatment, and mining, the humble agitator (or mixer) is the heart of the process. An undersized agitator leads to dead zones and product inconsistency; an oversized one wastes energy and capital. This is why agitator design calculation is not just a mathematical exercise—it is a critical engineering discipline. Here’s a professional write-up optimized for a webpage

1. Does it include the Reynolds transition check? (If no, discard it).
2. Are there correction factors for baffles? (Unbaffled tanks require (Np) corrections).
3. Is the critical speed calculation iterative? (One-step formulas are too simplistic).
4. Are seal friction losses included? (Adds 0.5–3 kW depending on pressure).
5. Is there a worked example with all units (SI/metric)? (Unit mismatch is the #1 error).

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