TY - JOUR
T1 - A calibration scheme for quantitative concentration measurements using simultaneous PIV and PLIF
AU - Sarathi, P.
AU - Gurka, R.
AU - Kopp, G.A.
AU - Sullivan, P.J.
PY - 2012/10/28
Y1 - 2012/10/28
N2 - A new approach for calibration of planar laser-induced fluorescence (PLIF) measurements is presented. The calibration scheme is based on the fact that there is a constant concentration flux through each cross-section of a fluorescent plume in a given flow field and makes use of simultaneous measurements of particle image velocimetry (PIV) and PLIF. The following are the advantages of the current technique: (1) it is experimentally less demanding and (2) it does not require in situ calibration for generating the calibration curves. The technique can be implemented in many experimental setups (both in water and gaseous flows) provided the geometry of the time-averaged scalar field is known. Using the calibration scheme, an analysis is carried out on the measurements of concentration fields in grid turbulence to validate the proposed technique. To demonstrate the feasibility of the scheme, the distributed second-order moments (μ 2), and concentration and velocity correlations (⟨u′c′⟩ and ⟨v′c′⟩) are computed. Good agreement is found with previous studies. In addition, a quantitative appraisal of a simple closure approximation of the moment-based transport equation is also presented using simultaneous PIV and PLIF.
AB - A new approach for calibration of planar laser-induced fluorescence (PLIF) measurements is presented. The calibration scheme is based on the fact that there is a constant concentration flux through each cross-section of a fluorescent plume in a given flow field and makes use of simultaneous measurements of particle image velocimetry (PIV) and PLIF. The following are the advantages of the current technique: (1) it is experimentally less demanding and (2) it does not require in situ calibration for generating the calibration curves. The technique can be implemented in many experimental setups (both in water and gaseous flows) provided the geometry of the time-averaged scalar field is known. Using the calibration scheme, an analysis is carried out on the measurements of concentration fields in grid turbulence to validate the proposed technique. To demonstrate the feasibility of the scheme, the distributed second-order moments (μ 2), and concentration and velocity correlations (⟨u′c′⟩ and ⟨v′c′⟩) are computed. Good agreement is found with previous studies. In addition, a quantitative appraisal of a simple closure approximation of the moment-based transport equation is also presented using simultaneous PIV and PLIF.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84855994993&partnerID=MN8TOARS
U2 - 10.1007/s00348-011-1219-7
DO - 10.1007/s00348-011-1219-7
M3 - Article
SN - 0723-4864
VL - 52
SP - 247
EP - 259
JO - Experiments in Fluids
JF - Experiments in Fluids
ER -