Abstract
The Point-Collocation Non-intrusive Polynomial Chaos (NIPC) method has been applied to a stochastic synthetic jet actuator problem used as one of the test cases in the CFDVAL2004 workshop to demonstrate the integration of computationally efficient uncertainty quantification to the high-fidelity CFD modeling of synthetic jet actuators. The test case included the simulation of an actuator generating a synthetic jet issued into quiescent air. The Point-Collocation NIPC method is used to quantify the uncertainty in the long-time averaged u and v-velocities at several locations in the flow field due to the uniformly distributed uncertainty introduced in the amplitude and frequency of the oscillation of the piezo-electric membrane. Fifth-order NIPC expansions were used to obtain the uncertainty information, which showed that the variation in the v-velocity is high in the region directly above the jet slot and the variation in the u-velocity is maximum in the region immediately adjacent to the slot. Even with a ±5% variation in the amplitude and frequency, the long-time averaged u and v-velocity profiles could not match the experimental measurements at y=0.1 mm above the slot indicating that the discrepancy may be due to other uncertainty sources in CFD and/or due to the measurement errors.
Recommended Citation
S. Adya et al., "Uncertainty Quantification Integrated to CFD Modeling of Synthetic Jet Actuators," International Journal of Flow Control, vol. 2, no. 3, pp. 169 - 181, Multi-Science Publishing, Sep 2010.
The definitive version is available at https://doi.org/10.1260/1756-8250.2.3.169
Department(s)
Mechanical and Aerospace Engineering
Keywords and Phrases
Computational Fluid Dynamics; Uncertainty - Mathematics; Actuators; Jets - Fluid dynamics
International Standard Serial Number (ISSN)
1756-8250
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2010 Multi-Science Publishing, All rights reserved.
Publication Date
01 Sep 2010
