Airflow is typically described in terms of volume and velocity, both of which are crucial in various applications such as HVAC systems, aerodynamics, and industrial processes.
1. Airflow Volume
Definition: The amount of air moving through a system over a period of time.
Units: Cubic feet per minute (CFM) – common in the U.S.
Cubic meters per hour (m³/h) – used internationally.
Liters per second (L/s).
Formula: Q
=
V
×
A
Q = V \times A where: Q
Q = Airflow volume (e.g., CFM or m³/h),
V
V = Velocity of air (e.g., feet per second, meters per second),
A
A = Cross-sectional area of the duct or passage (e.g., square feet, square meters).
2. Airflow Velocity
Definition: The speed at which air moves in a given direction.
Units: Feet per second (ft/s) or meters per second (m/s).
Formula: V
=
Q
A
V = \frac{Q}{A} where: V
V = Velocity of air,
Q
Q = Airflow volume,
A
A = Cross-sectional area of the duct.
Applications
HVAC (Heating, Ventilation, and Air Conditioning): Determines system efficiency and comfort.
Aerodynamics: Helps in designing aircraft and cars for optimal airflow.
Industrial Ventilation: Ensures proper fume extraction and cooling.
Computing & Electronics Cooling: Ensures efficient heat dissipation.
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