An overview of previous researches related to the problem flow around a bluff-body, using experimental and numerical methods, is presented in paper. Experimental investigation was performed by laser doppler anemometer, measuring velocity components water smooth sphere, sphere with dimples square channels. Measurement results subcritical field, fluctuation components, lift, drag pressure coeffic...

We aim at developing ultralight autonomous microflyers capable of freely flying within houses or small built environments while avoiding collisions. Our latest prototype is a fixed-wing aircraft weighing a mere 10 g, flying around 1.5 m/s and carrying the necessary electronics for airspeed regulation and lateral collision avoidance. This microflyer is equipped with two tiny camera modules, two ...

Airflow distribution in the greenhouse windows is important for us to understand the mechanism of natural ventilation and thus is helpful for designers to have the optimal ventilation system. The full-scale measurements of the airflow in a large Venlo-type greenhouse were carried out by use of an ultrasonic anemometer. The clear airflow patterns around the greenhouse under leeside ventilation w...

Results of the application of optical flow methods to eyesafe aerosol lidar images leading to dense velocity field estimations are presented. A fluid motion dedicated formulation is employed, taking into account the deforming shapes and changing brightness of flow visualization. The optical flow technique has the advantage of providing a vector at every pixel in the image, hence enabling access...

Wind speed and direction are critical meteorological elements. Multi-rotor unmanned aerial vehicles UAVs widely used as a premium payload platform in monitoring. The UAV is able to improve the spatial temporal resolution of elements collected. However, during wind measurement missions, installed anemometers susceptible interference caused by rotor turbulence. This paper puts forward pressure or...