Effect of Gas Turbulence in Quartz-enhanced Photoacoustic Spectroscopy: A Comprehensive Flow Field Analysis

Overview

Journal Photoacoustics

Date 2024 Jul 8

PMID 38974142

Authors

Andrea Zifarelli

Giuseppe Negro

Lavinia A Mongelli

Angelo Sampaolo

Ezio Ranieri

Lei Dong

Hongpeng Wu

Pietro Patimisco

Giuseppe Gonnella

Vincenzo Spagnolo

Affiliations

Soon will be listed here.

Abstract

Here we present a computational and experimental fluid dynamics study for the characterization of the flow field within the gas chamber of a Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) sensor, at different flow rates at the inlet of the chamber. The transition from laminar to turbulent regime is ruled both by the inlet flow conditions and dimension of the gas chamber. The study shows how the distribution of the flow field in the chamber can influence the QEPAS sensor sensitivity, at different operating pressures. When turbulences and eddies are generated within the gas chamber, the efficiency of photoacoustic generation is significantly altered.

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