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Realization of car’s frontal projected area based on OpenCV Chun Bo Dong1, a, Xing Jun Hu1,b,Yan Wang1,c,Li Min Fu1,d 1State Key Laboratory of Automotive Simulation and control, Jilin University, Changchun 130022, China adongchunbo@jlu.edu.cn, bhxj@jlu.edu.cn, cwyan1989@163.com, dlimin@jlu.edu.cn Keywords: Automotive Aerodynamics, frontal projected area; digital image processing; OpenCV Abstract.
Now, the method of calculating frontal area is CFD software which needs to enter the CAD data into the computer, then sets a model again.

Han et al. (2011) calculated the load coefficients for a car container running on the bridge and the load coefficients for the bridge were also investigated by numerical simulations (CFD).

., “Heat transfer simulation of metal foam heat sink for LEDs,” Proceedings of 18th CFD Conference, Taiwan, August, 2011

(a) (b) Fig. 1 Schematic diagram of experimental setup (a) and square test duct with a twisted tape (b) Fig. 2 Details of cross test section Mathematical Model The numerical simulations of the fluid flow and heat transfer in the analyzed square duct geometries are conducted with the CFX 11.0 commercial code.
Wilcox, Turbulence Modelling for CFD, DCW Industires, Inc., La Canada, CA. 1986

In addition, with the development of CFD technology, numerical prediction for the flow noise of fluid machines can be performed nowadays.
By means of numerical simulation, the source data of the experimental model will be calculated under the special acoustic condition of no reflection at the duct ends, and the calculated results will be compared with experimental results.

Azizli: CFD simulation and experimental analysis of flow dynamics and grinding performance of opposed fluidized bed air jet mill, Int.

Paik, “Heat flow analysis of an FPSO topside model with wind effect taken into account: A wind-tunnel test and CFD simulation,” Ocean Engineering, vol. 38, 2011, pp. 1130-1140

Lu, et al, “Estimation and experiment of axial thrust in centrifugal pump based on CFD,” Transactions of the Chinese Society of Agricultural Machinery, vol. 40, no. 1, pp. 60-63, January 2009
Zhang, “Emulation and simulation of dynamic weighting signal,” in Proceedings of International Conference on Intelligent Computation Technology and Automation, vol.

The expression (2) represents Strouhal number, with(f) the frequency of oscillation in the interaction region, (D) thehydraulicdiameterand (u) velocityof the jet: Str=f∙Du (2) The period of oscillations is determined by the switching time from the attachment wall to another and the transmission time through the feedback channel [3-6]; the frequency is determined by expression (3): T=2∙τt+τs=2∙(1C+ξ∙Lu) (3) Hypotheses: The simulation of the micro-injection systems is obtained with several hypotheses: ü Air and turbulent regime ü Incompressible ideal gas flow.
The Fluidic oscillator frequency to millimetre scale was simulated by the CFD code.

There is limited freedom in terms of design customization, and it has become a bottleneck for further research because the mesh design has many inherent dead zones that can allow foulant deposition [6]. 3D printing has been adopted in many recent studies to experimentally validate the performance of several innovative spacer designs (Fig 1b-e) that were found to be effective in computational fluid dynamic (CFD) simulations.