Calculation and Traceability of Suspended Particles in the Air2020-08-11T14:48:40+00:00

Calculation and Traceability
of Suspended Particles in the Air

Social distancing is essential to stay free from potential damaging particles (pathogens) suspended in the air, but what might look like the proper distance is not always the best strategy in enclosed spaces.

  • CFD – Computation Fluid Analysis

  • A versatile tool to determine the behavior of fluids and its variables in a given closed environments under different operating conditions.

  • Understanding of the system behavior and its variables improves the ability for better technical decisions regarding maximum occupancy in spaces, potential work risks and improvement of air quality.

An HVAC discharge may have been designed to generate the best energy utilization or comfort within a room, but probably its design may not be ideal for the best circulation path of injected air or to avoid the dispersion of harmful particles in an given environment.

Social distancing is the most appropriate method for reducing the spread harmful particles in a enclosed space, but knowing the behavior of a fluid in such enclosed space is an essential tool for decision-making and strategies validation to reduce exposure risks.

Why are Simulations Important?

  • Fluid Simulation allows us to understand the impact of the environment on the fluid movement.

  • Now we can recreate real conditions, through a mathematical model, to make reliable decisions based on real data.

  • Fluid Simulation allows to model and test different operating conditions, aimed to establish a safe, particle-free work environments.

Elevator, Front View (Current Operation)

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The stroke of the circulation tells us that air, when it does not have an easy exit, recirculates and it does so at a higher speed. This allows the particles in the air to stay longer close to the face of the occupants.

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We can see a very energetic and rotating flow, both at the bottom and at the top, enabling a longer exposure of harmful particles at a height close to the occupant’s airways. It is then recommended to improve the air output, both in direction and in speed.

Elevator (Proposed Modification after CFD simulation)

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The stroke of the circulation becomes more vertical. In this case the modification was the plane of output vent. In such a close space it is preferable to have a vertical circulation and that the recirculation areas are pushed the lowest possible location away from the occupant’s head.

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In this image you can see the velocity vectors across the walls of the elevator, with no areas of recirculation at the height of the occupants’ head.

Know the behavior of a fluid and its properties in an enclosed space.

Understand the strategies to be implemented based on key variables.

Implement strategies to reduce risks and to create a safe work area.

Make smart decisions with real data.

Mitigate the potential risks affecting the health of the occupants in the workplace.

Improve Collective Health in Workspaces

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