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Article information
2018 , Volume 23, ¹ 1, p.33-45
Zaripov D.I., Mikheev N.I., Dushin N.S., Aslaev A.K., Shakirov R.R.
Application of projection method to speed-up a new algorithm for the measurement of instantaneous flow velocity field
Applicability of projection method has been investigated to speed-up a new optical method for the measurement of flow velocity fields using smoke visualization. The algorithm is based on the analysis of integral projections of images on coordinate axes. The variation of random and bias measurement errors while changing the magnitude of uniform displacement of particles has been studied for the particle diameters of 2.2 and 10 pix. Synthetic images with sizes 16×16, 32×32 and 64×64 pix have been used to show that the application of projection method to image processing speeds up the processing time of the measurements by approximately 16, 140 and 1060 times, respectively. However, if compared with a new method of Smoke Image Velocimetry, it reduces the accuracy of the obtained data when processing the images with large particles (10 pix) imitating smoke structures. Nevertheless, the results obtained by the proposed speedup algorithm are not inferior in accuracy to similar data obtained by Particle Image Velocimetry. It is noted that the proposed speed-up algorithm can be applied to preliminary evaluation of initial displacement field with its subsequent refinement using more accurate computational algorithms and methods.
[full text]
Keywords: computational cost reduction, optical method, smoke visualization, PIV, SIV, accuracy assessment, velocity field measurement
doi: 10.5072/ICT.2018.1.11850
Author(s):
Zaripov Dinar Ilyasovich
Office: KazanSc of RAS
Address: 420111, Russia, Kazan
Mikheev Nikolay Ivanovich
Office: KazanSc of RAS
Address: 420111, Russia, Kazan
Dushin Nikolay Sergeevich
Office: KazanSc of RAS
Address: 420111, Russia, Kazan
Aslaev Albert Kamilovich
Office: KazanSc of RAS
Address: 420111, Russia, Kazan
Shakirov Radif Rustyamovich
Office: KazanSc of RAS
Address: 420111, Russia, Kazan
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Bibliography link:
Zaripov D.I., Mikheev N.I., Dushin N.S., Aslaev A.K., Shakirov R.R. Application of projection method to speed-up a new algorithm for the measurement of instantaneous flow velocity field // Computational technologies. 2018. V. 23. ¹ 1. P. 33-45
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