Abstract The performance of heat transfer enhancement (HTE) using modified inserts (MIs) as a vortex generator in pipe flow and fluid analysis computational dynamics (CFD) are evaluated this article. MIs fastened to the central rod, circular sections touched wall test pipe. Heat analyses carried out for various pitch diameter ratios (P/D) angles MIs. P/D 3, 4 6 15°, 30°, 45°, 60° 90° considered...

Understanding flow structures in urban areas is widely recognized as a challenging concern due to its effect on development, air quality, and pollutant dispersion. In this study, state-of-the-art data-driven methods for modal analysis of simplified flows are used study the dominant processes these environments. Higher order dynamic mode decomposition (HODMD), highly-efficient method analyze tur...

In this paper the effects of rigid triangular passive vortex generators on a  hydrofoil were investigated numerically.  In the first step using the Finite Volume Method the bare hydrofoil  were modeled and the results of lift and drag coefficients were validated using experimental data. In the next step the hydrofoil armed with vortex generators was modeled and its effect on the hydrofoil perfo...

A wind tunnel investigation was performed to study the flow field over a 70° swept sharped edge delta wing model at high angles of attack. The experiments were conducted in the subsonic wind tunnel at the Department of Mechanical Engineering, Sharif University of Technology. Velocity profiles have been measured using a special pitot tube and hot wire anemometer at angles of attacks of 10 to 35 ...

The alula is a small structure located at the joint between the hand-wing and arm-wing of birds and is known to be used in slow flight with high angles of attack such as landing. It is assumed to function similarly to a leading-edge slat that increases lift and delays stall. However, in spite of its universal presence in flying birds and the wide acceptance of stall delay as its main function, ...

Visualization of water flow around different bluff bodies at Reynolds number ranging (1505 - 2492) was realized by designing and building a test rig which contains an open channel capable to ensure velocity range (4-8cm/s) in this channel. Hydrogen bubbles generated from the ionized using DC power supply are visualized light source photographed digital camera. Flow pattern circular disk (3.6cm)...