DescriçãoHEPA Filter diagram es.svg	English: diagram showing the main parts of a HEPA filter on the large diagram; its operation is shown on the 3 smaller diagrams: *the thick brown/tan lines represent fibers in the filter medium. *the blue lines represent air flow. *The dark circle represents a particle (dust, bacteria, spore, etc.) *the dotted red line represents the trajectory of the particle; consider that as soon as a particle comes within one radius of a fibre it adheres to it. *in the case of diffusion, the particle (usually 0.1 µm or smaller) has such a trajectory because of the collision with gas molecules. On the 100 nm to 1 micron scales that are the most challenging for filters, it is helpful to think of air as a viscous fluid like molasses. As the fluid flows through the filters, particles are carried around the fibers of the filter medium, for the most part. Inertial impaction: Larger particles (>1 micron) may be massive enough to continue to move in nearly a straight line (Newton's Law), as the flow is diverted around a fiber. Interception: Smaller particles are not much affected by inertia, but, if they are carried within one particle radius of the fiber, they will be intercepted by it. Diffusion: Still smaller particles (<100 nm) move randomly among streamlines as they are buffeted by collisions with molecules. A particle along a streamline that approaches a fiber very closely may be knocked against the fiber by such a collision. English: This image was created as part of the Philip Greenspun illustration project.
Data	12 de novembro de 2010, 22:00 (UTC)
Origem	HEPA_Filter_diagram_en.svg
Autor	HEPA_Filter_diagram_en.svg: Kizar derivative work: Kizar (talk)
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This image is a derivative work of the following images:

• File:HEPA_Filter_diagram_en.svg licensed with PD-user
  • 2008-09-01T08:06:29Z LadyofHats 607x544 (404084 Bytes) corrected particle size, aded average size of particles and trajectory on difuccion
  • 2008-08-15T21:55:12Z LadyofHats 607x544 (393067 Bytes) darker text
  • 2008-08-14T21:17:27Z LadyofHats 607x544 (393021 Bytes) this is a corrected version of the original
  • 2008-08-14T21:16:33Z LadyofHats 607x544 (327559 Bytes) THID VERSION CONTAINS LABELS AS TEXT!
  • 2008-08-13T16:01:32Z LadyofHats 607x544 (391421 Bytes) {{Information |Description=diagram showing the main parts of a HEPA filter and the way it works. |Source=Did myself using this sources: [http://people.seas.harvard.edu/~jones/lab_arch/nano_facilities/hepa.gif], [http://www.sa

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