Computational fluid dynamics as a method for studying wind comfort

The paper presents a comprehensive analysis of the wind flow interaction with a high-rise building, considering various types of streamlined flow acceleration, as well as an assessment of the aerodynamic shadow behind the building, and areas with increased wind speeds. The authors analyze risks caused by these zones, as well as suggest measures to minimize them.

Computational analysis of mixture(LPG/Air) formation and performancein a dual fuel diesel engine

This paper focuseson the use of CFD in advancing the LPG/air blend development of a dual fueled IC engine (Diesel and LPG). LPG is introduced through a secondary gas tube to the intake duct of the engine, keeping up 45° point to the flow direction. The variations in the stream boundaries change the output of the engine. Thus there is apossibility for gas tube design to position it and to get an optimized performance. From the previous literatures, CFD tool can be utilized to streamline the gas flow boundaries to improve execution. Familiar programming has been utilized to tackle this issue and approved with trial results. The outcomes show that the streamlined flow boundaries by FLUENT demonstrate 3% improvement in performance of the engine and 11% decrease in NOx emission.

Design and Experimental Verification of a PZT Pump with Streamlined Flow Tubes

In this paper, a streamlined flow tube valveless piezoelectric pump (SLFT PZT pump) is proposed to modify the single flow trend and improve the fluid flow stability. Firstly, the structural and working principle of the streamlined flow tube, which accounts for changing the flow trend and improving the flow stability, were analyzed. The flow resistance and flow rate equations were established. Secondly, the pressure and velocity fields of the tube were simulated. These simulated results were consistent with the theoretical results. Thirdly, the flow resistance of the flow tube was tested with pressure differences of 1000 Pa, 1200 Pa, 1400 Pa and 1600 Pa respectively. The trend of the result curves was consistent with the simulated results. The amplitude-frequency relationship and the flow-rate-frequency relationship were also tested, both result curves highly corelate. The maximum amplitude was 0.228 mm (10 Hz, 120 V), and the maximum flow rate was 17.01 mL/min (10 Hz, 100 V). Finally, the theoretical flow rate of the SLFT PZT pump was calculated at 100 V and 120 V. These results roughly fitted with the experimental results. The streamlined flow tube could change the internal flow trend that remarkably improved the flow stability. Therefore, it promoted the application of the valveless PZT pump in living cells, biomedical and polymer delivery.