Fluid and oscillation ? Suppose that you don't want to dare at first glance but don't care, surely. A fluidic oscillator creates oscillation regarding the bi-stable states of a jet of fluid insidE a specially designed flow chamber. We need neither internal equipment or a novel design. Although It was invented in 1959, studies in accordance with fluidic oscillator have been released recently. The basic idea can be specified the video as below: It looks impressive, isn't it ? A recent master thesis has been unveiled by TU Delft. Different models had been examined through study and the most effective design were obtained that has partially different structures than the model of TU Berlin (video as above). If you want to get broadly information, you may check this thesis: Click for TU Delft Thesis Besides, I have conducted an analysis with Ansys Fluent to relieve my curiosity. I generated 2d fluidic oscillator based on TU Berlin's design and have carried out a numerical study. So to recap, I want to say that It totally works at computational domain (If only I had a 3D printer generate my model and validate numerical results). 2D, transient (timestep = 0.05 seconds) and 0.3 m/s inlet velocity are some of ingredients. I have totally simulated 5 seconds is as below: It is quite easy and might work. Have you ever wonder where does fluidic oscillator is being used? Do you feel the connotation between Karman Vortex and Fluidic Oscillator ? Update: 18.02.17 2D & unsteady flow simulation has been carried out with Ansys Fluent 16.2. Inlet flow velocity is 0.3 m/s and flow goes through atmospheric pressure. Were a cylinder to be located through diverging nozzle of fluidic oscillator, would it be beneficial to oscillation in accordance with karman vortex ? Here we go. Pressure distributions after both phenomenon seem similar that have triggered my curiosity. Therefore, I have designed a fluidic oscillator has a cylinder through diverging nozzle. Apart from oscillation generated by fluidic oscillator, also cylinder even may trigger flow to generating oscillation. The simulation driver comparison is as below: Left to right Case 1: No specific structure Case 2: Fluidic oscillator Case 3: Cylinder combined fluidic oscillator (on diverging nozzle side) Last update:18.02.2017
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