in this work, three-dimensional turbulent forced convection flow through a b-type section pipe, which porous material inserted at the bottom wall, is investigated numerically. the b-type section pipe are used in cooling systems, such as cars’ radiators. the main purpose of this research is to enhance heat transfer and to reduce the scales of such systems. the governing equations are formulated ...

Nowadays, the MIMO can achieve fifth generation (5G) ultra-high capacity, but it is a great challenge for smartphone antenna to good isolation, high efficiency, and other performance in limited space. The paper designed completed an eight-port dual-polarized high-efficiency shared-radiator working 3.5 GHz (3.4–3.6 GHz) 5G mobile devices. two elements are regarded as one building block share rad...