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IBIS Group

An independent corporation of CFD engineers

Pump Sump Analysis and Design

Since incorporating, Ibis Group has completed over 30 pump station analyses. These analyses are for both proposed design evaluation and diagnostic work on existing stations. For the evaluation of a station, the American National Standard for Pump Intake Design (ANSI/HI 9.8-1998) is used. Presently, this standard is accepted worldwide and stations built to it consistently meet their design performance requirements. The ANSI/HI standard provides recommended ranges for:

  • Inlet pre-swirl angle
  • Axial velocity distribution
  • Surface vortex and submerged vortex entrainment

Basic pump station models are steady state providing time averaged results and have a “rigid lid” or “inviscid wall” representing the water surface.

More advanced models may be time dependent and have a free moving air/water interface at the water surface. It is also possible to document and mitigate regions of potential sediment buildup.

View our Powerpoint Slideshow

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Click here for a pdf of our presentation.

View our Powerpoint Slideshow

Use the arrows to navigate the slides

Click here for a pdf of our presentation.

Bulk Flow Patterns in a Pump Station
Bulk Flow Patterns in a Pump Station
Free Surface Model Showing Air Entrainment
Free Surface Model Showing Air Entrainment
Free Surface Model
Free Surface Model
Submerged Vortex Beneath an Inlet
Submerged Vortex Beneath an Inlet
Surface Vortices
Surface Vortices
Surface Vortices
Surface Vortices

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