Negative pressure

Negative Pressure

Negative pressure is a term used in Physics and Engineering to describe a condition where the pressure in a certain area or system is lower than the pressure in the surrounding environment. This phenomenon is commonly observed in various fields such as Medicine, Meteorology, and HVAC systems.

Overview

Negative pressure is a state where the pressure inside a closed system is less than the pressure outside the system. This difference in pressure levels can cause air or fluids to flow from areas of higher pressure to areas of lower pressure, a process known as Pressure Gradient Force.

Applications

Medicine

In the field of medicine, negative pressure is often used in negative pressure wound therapy (NPWT). This involves the use of a sealed wound dressing connected to a vacuum pump to create a negative pressure environment in the wound. This helps to remove excess fluid and promote healing.

Meteorology

In meteorology, negative pressure systems are associated with storm systems. These systems, also known as low-pressure systems, can cause severe weather conditions including heavy rain, snow, and strong winds.

HVAC Systems

In HVAC systems, negative pressure is used to control the flow of air through the system. This is achieved by creating a lower pressure inside the ductwork than the surrounding air pressure, causing air to flow into the system.

See Also

• Positive Pressure
• Pressure Gradient Force
• Low-Pressure Area
• Negative Pressure Wound Therapy

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