Distortion of passive scalar structure during suction-based plume sampling
Distortion of passive scalar structure during suction-based plume sampling
复制标题
基于吸力的羽流采样过程中被动标量结构的畸变
DOI:
10.1016/j.snb.2022.132018
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Crimaldi, John P.
中科院分区:
文献类型:
--
作者:
True, Aaron C.;Crimaldi, John P.
Studies of plume dynamics and olfaction often rely on photoionization detectors (PID) to quantify spatiotemporal distributions of passive scalars (gases, vapors, odors). However, the potential for PID suction to distort filaments and to modify the resulting sensed time record remains unclear. We used computational fluid dynamics to model a widely-used PID to quantify and parameterize suction distortion by considering how sensed concentration records compare to those registered by an ideal probe absent distorting effects. Models cover a range of realistic plume conditions, and we show that PID can modify the peak concentration and pulse shape of sensed records, with peak amplitude reduced by up to 45% and pulse width increased by up to 100% for the cases considered here. We quantified how distortion varies in three key nondimensional parameters describing PID geometry and plume sampling conditions: relative suction rate, relative filament size, and ambient flow Reynolds number. We combined analytical and numerical tools with dimensional analysis and scaling arguments to interpret results and discuss when distortion is likely and what drives it. We built a dimensionless distortion scaling parameter and simple regressions capable of predicting distortion levels, and our results enable PID users to estimate distortion levels and to employ mitigation strategies through suction velocity tuning. We show that an ideal relative suction rate (ratio of suction-to-ambient velocities) near 30 minimizes distortion universally for the Aurora Scientific miniPID. The findings and discussion herein can inform distortion-mitigating design principles and best sampling practices for other suction-based passive scalar sensing schemes.
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DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
E. Yee;P. Kosteniuk;G. Chandler;C. Biltoft;J. Bowers
通讯作者:
J. Bowers
影响因子:
3.7
作者:
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DOI:
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1985
期刊:
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作者:
J. Driscoll
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影响因子:
16.6
作者:
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通讯作者:
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影响因子:
2.7
作者:
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通讯作者:
Balos, Cody J.