Good modelling practice in applying computational fluid dynamics for WWTP modelling

Area of Science:

• Environmental Engineering
• Fluid Mechanics
• Water Treatment Technologies

Background:

• Computational fluid dynamics (CFD) is increasingly utilized in wastewater treatment (WWT) for complex problem-solving.
• The efficacy of CFD models in WWT is contingent upon their appropriate application and understanding of limitations.
• Establishing standardized practices is crucial for advancing the use of CFD in environmental engineering.

Purpose of the Study:

• To define and recommend Good Modelling Practice (GMP) for CFD applications in wastewater treatment.
• To consolidate the findings and recommendations of an International Water Association (IWA) working group on CFD in WWT.
• To provide a foundational overview of GMP for wastewater CFD, drawing from general CFD procedures.

Main Methods:

• A review and synthesis of recommendations from an IWA working group focused on CFD in water and WWT.
• Development of general GMP guidelines applicable to wastewater CFD.
• Summarization of key challenges and issues related to CFD modelling in the WWT field.

Main Results:

• The paper presents a summary of the IWA working group's recommendations for GMP in wastewater CFD.
• General GMP principles are outlined, applicable across various wastewater modelling scenarios.
• The study identifies the need for proper application and awareness of limitations for effective CFD use.

Conclusions:

• Implementing GMP is essential for maximizing the value and reliability of CFD models in wastewater treatment.
• The presented guidelines serve as a basis for consistent and effective CFD application in the WWT field.
• Further detailed guidance on specific wastewater components will be provided in a companion paper.