Cleanroom Airflow Alignment Metric Rδ
Year: 2025
Type: article
Abstract: This study proposes and validates a novel metric, the Cleanroom Airflow Align- ment Metric (Rδ ), to quantify and optimize vertical airflow alignment in ceiling- mounted Fan Filter Unit (FFU) cleanrooms. By formulating a simplified one- dimensional energy balance between alternative airflow pathways (horizontal-to- vertical vs. vertical-to-horizontal), Rδ enables rapid assessment of FFU operating strategies without requiring full CFD simulations.The proposed Rδ index was validated through both CFD analysis and in-situairflow measurements, showing strong correlation with deflection angle and air age metrics. Sensitivity analysis confirmed that Rδ is robust against uncertainties inair density, floor resistance coefficients, and wall roughness assumptions.
Author: lee, changgyu
Institution: University of Seoul
Language: English
Topic: Wind and Air Flow Studies
Subfield: Environmental Engineering
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6949540043
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