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Modelling and Simulation in Engineering
Volume 2015, Article ID 343087, 8 pages
Research Article

Uncertainty Analysis of Mixing Efficiency Variation in Passive Micromixers due to Geometric Tolerances

Department of Engineering in Foreign Languages, University “Politehnica” of Bucharest, Splaiul Independenței 313, 060042 Bucharest, Romania

Received 30 September 2015; Accepted 29 November 2015

Academic Editor: Zhiping Qiu

Copyright © 2015 Irina Stanciu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The geometric layout is the key factor for enhancing the efficiency of the fluid mixing in passive micromixers. Therefore, by adjusting the geometric design and by controlling the geometric parameters, one can enhance the mixing process. However, through any fabrication process, the geometric parameters present slight, inherent variation from the designed values than might affect the performance of the micromixer. This paper proposes a numerical study on the influence of the unavoidable geometric tolerances on the mixing efficiency in passive micromixers. A probabilistic simulation model, based on the Monte Carlo method, is developed and implemented for this purpose. An uncertainty simulation model shows that significant deviations from the deterministic design can appear due to small variations in the geometric parameters values and demonstrates how a more realistic mixing performance can be estimated.