Venturi Carpet Technology · Interactive Library

Yellow Target Intro v2.0

Why cone filling is not the objective: the root responds to a hydrothermal field, not to volume alone.

FIELD

z_p ≡ s* · C(z_p) = C_crit · z_h = L

ENTER

Two surfaces create one field

Two surfaces · one physical wall

The cone is not a pocket. It is a two-sided interface.

Its compost-facing surface interacts with moisture, thermal mass and the growing root. Its air-facing surface interacts with ambient temperature, airflow and radiation. Together with the outlet geometry, both surfaces create a local hydrothermal field before the root arrives.

inner surface + outer surface + outlet geometry → hydrothermal field

compost-facing fieldair-facing fieldno full-fill requirement

Enter Yellow Target Explorer

Observed discrepancy → Design refinement

Exit point ≠ pruning point.

The visible root response suggests that termination can occur inside the outer cone before the apex reaches open air. This is treated here as a working hypothesis to be tested, not as a finished conclusion.

Observation

root termination may appear before the outlet plane

Working hypothesis

local drying field → t_dry ≤ t_crit

Two positions

z_p = pruning front
z_h = outlet position

Design question

Can geometry place z_p exactly where branching is most useful?

Compost-Facing Surface

Root, compost, liquid water, vapor and thermal mass define the inner hydrothermal interface.

guidance · retention · condensation

Air-Facing Surface

Ambient air, wind, radiation, humidity and temperature control heat and mass transfer outside.

airflow · evaporation · cooling

Ruby Indicator

A diagnostic marker showing when the hydrothermal target becomes readable.

indicator ≠ pruning point

Yellow Target

The predicted zone where the apex reaches the critical drying condition.

target = pruning front

New engineering target

Not just a cone.
A programmable pruning field.

Outlet diameter is only one design variable. Cone height, angle, outlet position, ribs, surface profile and environmental conditions can all shift the predicted pruning-front position.

z_p = f(d_h, z_h, H, θ, ribs, U, T, RH, compost state, …)

Geometry → field shape

Environment → field intensity

hydrothermal threshold → predicted zₚ