Ayres Knowledge Center Computational Fluid Dynamics

Computational Fluid Dynamics
Computational fluid dynamics (CFD), also known as three-dimensional (3D)
hydraulic modeling, is a practical way to predict and visualize how water flows
in real-world conditions. CFD solves fundamental flow equations that describe
how physical laws govern fluid motion. CFD provides detail and insight that
one-dimensional (1D) and two-dimensional (2D) hydraulic models cannot
deliver by resolving the flow in three directions. Using CFD, we can deliver the
practical benefits of physical modeling in a reasonable time and budget.
WHAT BENEFITS DOES CFD DELIVER?
1D and 2D hydraulic models are effective tools for large-
scale, hydraulically straightforward applications. Ayres has
pioneered and championed 2D hydraulic modeling’s practical
implementation, and it has become the method of choice for
many design applications. However, 2D modeling is not the
best solution for certain complex hydraulic problems.
CFD IS VERSATILE FOR USE IN MANY
APPLICATIONS, INCLUDING:
• Dam structures
• Aquatic Organism Passage (AOP)
In these cases, designers have historically either accepted
undefined hydraulic uncertainly or have used physical
modeling. High uncertainty requires conservative (potentially
overbuilt) designs or it could result in underperforming
solutions. Physical models can be reliable, but are often
prohibitively expensive and time-consuming. • River features
CFD puts another tool in the Ayres hydraulic modeling toolbox
that reduces risk and uncertainty while allowing us to deliver
effective design solutions and cost savings for these complex
hydraulic problems. • Wastewater treatment systems
Risk Mitigation – Cost Savings – Reduced Uncertainty
• Stormwater structures
• Sediment transport and scour
• Stormwater best management practice devices
• Water treatment tanks and processes
• Decision-making demonstrations
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