A fluidic flowmeter

Flow physics of planar bistable fluidic oscillator with backflow limbs

“…It can be seen that the jet oscillation frequency varies linearly with the Reynolds number (inlet velocity/flow rate) with Strouhal number of ~0.0047. Owing to this property FOs have been used as a flow meter and flow controller 17–19 . The jet oscillation frequency measured experimentally using the video analysis and pressure sensors is also shown in Figure 8.…”

“…FOs have been used as flow meters and fluidic actuators. Tippetts et al, 17 Wright, 18 Tesar, 10 and Shakouchi 19 studied FO, where the jet oscillation frequency was correlated with the flow rate. Wang and Xu 20 evaluated a FO for liquid–liquid extraction and demonstrated excellent performance.…”

A novel fluidic oscillator incorporating step-shaped attachment walls

“…Based on the channel structure and the operating principle, previous investigations of fluidic oscillators are classified into three types: feedback oscillator [1][2][3][7][8][9], Karman vortex oscillator [11,12], and concave-type oscillator (Vee-gutter or U concavity) [13][14][15][16][17][18]. Tippetts et al [19,20] deduced four major parameters for feedback fluidic oscillator of relaxation type, namely its Strouhal number (Sr), Reynolds number (Re), Euler number (Eu), and a dimensionless control loop inductance (L ), which serve also for dimensionless analysis in discussion, defined as follows:…”

Two-dimensional analysis of a simplified fluidic oscillator

“…Because, it has some advantages which commonly subsist in other flow-induced-vibration devices. So, it is sometimes referred to as 'an oscillatory-jet-type flowmeter' or 'a flip-flop (jet) nozzle' (Ozaki & Hara, 1963;Tippetts et al, 1973;Viets, 1975;Morris et al, 1992;Raman et al, 1993;Raman et al, 1994;Funaki et al, 1999;Funaki et al, 2007). And recently, it is also referred to as 'a sweeping jet actuator' in aeronautical applications (Seele et al, 2009;Ostermann et al, 2015).…”