Vertical Transparent Aerodynamic Elutriator Column
Clear acrylic vertical duct (15 cm diameter, 1.5 m height) with wire mesh suspension grid.
Agricultural Engineering / Grain Terminal Velocity
FREE TO EXPLORELABORATORY 24 · AGRICULTURAL ENGINEERING
Aerodynamic Terminal Velocity & Pneumatic Separation of Grains and Chaff
Measure the aerodynamic terminal suspension velocity of agricultural grain kernels across varying seed equivalent diameters using a vertical wind column elutriator. Explore interactive farm machinery simulation, irrigation hydraulics, and agricultural engineering telemetry.
FARM MACHINERY · SOIL & WATER · POST-HARVEST · STRUCTURES
Your virtual agricultural engineering laboratory.
TERMINAL SUSPENSION VELOCITY V_T—
FIELD & TEST CELL TELEMETRY
Ready to sample with Diameter D_p = 3.9 mm.
Adjust Diameter D_p, then execute agricultural trial.
Agricultural engineering telemetry and biosystems states are evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity agricultural and environmental modeling.
Agricultural assumptions and boundary condition limits
Individual kernels within the same sieve fraction exhibit minor shape and density variations, producing a ±5% velocity band. Evaluated using calibrated fractions of cereal wheat kernels (particle density ρ_p = 1320 kg/m³) across equivalent diameters from 2.5 mm to 6.0 mm in air at 20°C.
Agricultural apparatus & field instrumentation sensors.
Variable-Frequency Centrifugal Air Blower
Supplies upward airflow with continuous velocity control from 2.0 to 14.0 m/s.
Multi-Point Hot-Wire Anemometer Probe
Measures centerline air velocity at the seed suspension plane with 0.05 m/s accuracy.
Digital Sieve Sizer & Micrometer Caliper
Classifies wheat kernels into narrow geometric equivalent diameter fractions.
Air Flow Straightener Honeycomb Section
Eliminates swirl, eddies, and non-uniform turbulence ahead of the suspension zone.
High-Speed Video Camera (240 FPS)
Records particle floating stability, orientation, and rotational tumbling dynamics.
FOLLOW THE METHOD
A reason behind every step.
Measure the aerodynamic terminal suspension velocity of agricultural grain kernels across varying seed equivalent diameters using a vertical wind column elutriator. Standardized parameter settings: 2.5, 3.2, 3.9, 4.6, 5.3, 6.0 mm.
01
Seed Fraction Classification
Screen certified wheat seed through precision round-hole sieves into six distinct equivalent diameter fractions: 2.5, 3.2, 3.9, 4.6, 5.3, and 6.0 mm, measuring tri-axial dimensions with calipers.
02
Elutriator Column Zeroing
Inspect the vertical column, zero the hot-wire anemometer, and ensure honeycomb flow straighteners are clean and free of dust.
03
Initial Grain Fraction Introduction
Place 10 kernels of the 2.5 mm diameter fraction onto the wire mesh screen at the base of the transparent column.
04
Terminal Suspension Adjustment
Slowly increase blower frequency until the kernels lift off the screen and hover in stable floating suspension at the column mid-height without exiting the top.
05
Air Velocity Logging
Record the vertical air velocity v_t (m/s) from the anemometer probe at the suspension plane, repeating 5 times to compute mean terminal velocity.
06
Diameter Stepping & Regression
Repeat the suspension procedure for the remaining five diameter fractions up to 6.0 mm, plot v_t versus D_p, and determine the aerodynamic scaling slope k_v.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into agricultural engineering insight.
Points are your recorded observations. The solid regression line validates Grain Terminal Velocity mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
v_t = k_v · D_p = 1.7500 · D_p
| # | Equivalent Kernel Particle Diameter D_p (mm) | Terminal Suspension Velocity v_t (m/s) | Kernel diameter D_p (mm) | Terminal velocity v_t (m/s) | Remove |
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