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Agitating performance is a simple idea: how well a stirring system keeps everything in a tank evenly mixed, so solids don't settle and concentration stays uniform.
Agitating performance means how effectively an agitation system (agitator blade, jet nozzle, air sparging, etc.) can:
One-line meaning: It tells you how good the stirring/mixing is inside a tank.
Think of a bottle with chocolate powder in water. If you don't shake it well, the powder settles at the bottom and the top tastes like plain water.
Agitating performance is basically: "How well does the machine keep the powder mixed so every sip tastes the same?"
| Language | Word / phrase | Simple explanation | Related to |
|---|---|---|---|
| Hindi | हिलाने की क्षमता | टैंक में दवा/पाउडर बराबर मिलाकर रखना ताकि नीचे न बैठे | खेती स्प्रे टैंक, फैक्ट्री टैंक |
| Marathi | ढवळण्याची कार्यक्षमता | द्रव आणि पावडर नीट मिसळून एकसारखे ठेवणे | शेती/उद्योग |
| Tamil | கலக்கும் திறன் | தொட்டியில் திரவம்/தூள் சமமாக கலக்க உதவும் திறன் | விவசாய/தொழில் |
| Kannada | ಕಲಿಸುವ ಕಾರ್ಯಕ್ಷಮತೆ | ಟ್ಯಾಂಕ್ ಒಳಗೆ ದ್ರವ/ಪುಡಿ ಸಮವಾಗಿ ಕಲಸುವುದು | ಕೃಷಿ/ಕಾರ್ಖಾನೆ |
| Bengali | নাড়ানোর দক্ষতা | তরল/গুঁড়ো সমানভাবে মিশিয়ে রাখা | কৃষি/শিল্প |
| Gujarati | હલાવવાની કાર્યક્ષમતા | દ્રવ/પાવડર સમાન રીતે મિશ્ર રાખવું | ખેતી/ઉદ્યોગ |
| Telugu | కలపడం పనితీరు | ద్రవం/పొడి సమంగా కలవడం | వ్యవసాయం/పరిశ్రమ |
| Malayalam | കലക്കുന്ന പ്രകടനം | ദ്രാവകവും പൊടിയും ഒരുപോലെ കലരാൻ സഹായിക്കുന്ന ശേഷി | കൃഷി/ഫാക്ടറി |
Example: A sprayer tank jet may create movement near the nozzle (agitation), but if corners remain still, the mixing result is still poor.
Mechanical systems use a motor-driven rotating impeller to circulate fluid (propellers/turbines/paddles/anchors, etc.).
More details on impeller-selection and optimization are available on our website.
Jet agitation uses pressurized liquid through a nozzle to form a jet that circulates tank contents. Performance depends heavily on:
Pneumatic agitation uses air bubbles to create circulation. It's used in some industrial setups where gas dispersion or gentle mixing is needed.
For mechanical agitators, speed (RPM) strongly influences flow strength and turbulence.
Tip speed (m/s) = π × D × N
Example: D = 0.3 m, N = 2 rev/s (120 RPM)
Tip speed = 3.1416 × 0.3 × 2 = 1.885 m/s
Why this matters: Tip speed is a quick "feel" for how aggressive the agitation is.
Internal link suggestion: For practical speed-optimization dos/don'ts (without overdoing energy or causing issues), link to your published "optimize agitator performance" article.
Re = (ρ × N × D²) / μ
Example: ρ = 1000, N = 2, D = 0.3, μ = 0.001
Re = (1000 × 2 × 0.09) / 0.001 = 180,000 (typically turbulent; mixing is usually easier)
P = Np × ρ × N³ × D⁵
Sometimes engineers want a single number to compare "how much agitation is happening" across different setups. One proposed approach is an agitation index based on velocity measurements inside the vessel, making it more objective than "it looks mixed."
(You don't need to implement velocity probes to understand the concept—think of it as "a score built from measured flow speeds inside the tank.")
Even with high speed/pressure, dead zones can form due to:
| Factor | What it means | Example impact |
|---|---|---|
| Agitation speed | RPM or jet intensity | Higher speed often mixes faster (but can cause issues if excessive) |
| Tank geometry | Shape, baffles, internals | Poor geometry creates dead zones |
| Fluid viscosity | "Thickness" of liquid | Thick fluids need more energy to circulate |
| Solid properties | Particle size, density | Heavier solids settle faster |
| Jet nozzle size & pressure | For jet agitators | Changes jet momentum and circulation strength |
A very practical way to judge agitating performance is to sample from different levels (top/middle/bottom) and check how much each sample's concentration deviates from a "basis" concentration.
A classic ISO sprayer test procedure (older edition) describes an agitation test using a 1% suspension of copper oxychloride, sampling at 90%, 50%, and 10% of a reference level, and checking whether level means fall inside a narrow band.
It also states that if mean values at each level are not between 0.95 and 1.05, the test should be repeated with more effective agitating.
Instead of slow concentration/drying checks, many setups use turbidity as a quick proxy for "how uniform the suspension is."
"Agitator operation" is not just ON/OFF—it includes how you start, ramp speed, and what liquid level you run at.
A widely cited operational caution: don't run an agitator at full speed when the vessel is empty or when the liquid level is around the blade level, because that can create unfavorable conditions for equipment and seals.
(Keep this as an operational rule-of-thumb; detailed troubleshooting belongs in a separate maintenance/reliability piece.)
It's how well a system keeps a tank mixture uniform so solids don't settle and concentration stays consistent.
It's a proposed metric to objectively quantify agitation using measured velocities inside a vessel, so different setups can be compared with a number.
Higher speed often increases circulation and turbulence, which can improve uniformity—but it can also introduce vortexing/foaming or operational risk if misapplied. (For practical "how-to optimize speed," link to your published guide.)
It means how you run the agitator (start-up, ramping, and liquid level conditions). Guidance commonly warns against running full speed when the vessel is empty or near blade-level liquid conditions.
A practical method is sampling at multiple levels and checking concentration deviation from a basis concentration (ISO-style procedure).
Because jet placement, nozzle momentum, tank geometry, and dead zones can still allow settling in low-circulation regions.
Not always. Pressure matters, but nozzle orifice size and positioning strongly affect circulation paths and uniformity.
Turbidity (NTU) is usually faster using a turbidimeter. Drying/concentration methods are slower but more direct.