Fresh and expressive all-new Nissan Sunny 2020 makes its regional debut at Dubai International Motor Show

Access the most comprehensive database of companies and officers in the Middle East and North Africa, covering all major sectors and industries, from Refinitiv. Screen, analyze and compare projects in the Middle East and North Africa across Infrastructure, Real Estate, Industrial and Energy sectors with Refinitiv’s Eikon. Dubai, United Arab Emirates : Surrounded by car enthusiasts and top industry leaders, Nissan Middle East launched the all-new Nissan Sunny 2020 today at Dubai International Motor Show 2019. Combining a new dramatic and expressive exterior with a fresh new interior, the all-new Sunny embraces class-above features and quality and will be on sale starting March 2020. The Sunny is one of Nissan’s top selling vehicles in the region. Since it was officially introduced by Nissan in the region in 1994, over 474,500 units have been sold in the GCC alone. It is by far the segment leader in the region witnessing a 34% sales in financial year 2018. Nissan has given its acclaimed sedan a boost up in terms of offering a new level of refinement with a dramatic design. The new generation car builds on this solid foundation and reinforces Nissan’s presence in the increasingly ...

Sustained drag reduction in a turbulent flow using a low-temperature Leidenfrost surface

Skin friction drag contributes a major portion of the total drag for small and large water vehicles at high Reynolds number (Re). One emerging approach to reducing drag is to use superhydrophobic surfaces to promote slip boundary conditions. However, the air layer or “plastron” trapped on submerged superhydrophobic surfaces often diminishes quickly under hydrostatic pressure and/or turbulent pressure fluctuations. We use active heating on a superhydrophobic surface to establish a stable vapor layer or “Leidenfrost” state at a relatively low superheat temperature. The continuous film of water vapor lubricates the interface, and the resulting slip boundary condition leads to skin friction drag reduction on the inner rotor of a custom Taylor-Couette apparatus. We find that skin friction can be reduced by 80 to 90% relative to an unheated superhydrophobic surface for Re in the range 26,100 ≤ Re ≤ 52,000. We derive a boundary layer and slip theory to describe the hydrodynamics in the system and show that the plastron thickness is h = 44 ± 11 μm, in agreement with expectations for a Leidenfrost surface. Hydrodynamic drag resulting from the action of fluid viscosity not only results in...