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Zunce Wang, Yimin Wang, Jinglong Zhang, Sen Li and Yan Xu
The processing of dimple on the outer wall of tube will produce corresponding protrusion dimple on the inner wall. The turbulent flow and heat transfer performance of a tubular heat exchanger containing a dimpled inner tube is studied numerically. The re...
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Stephan Sundermeier, Maximilian Passmann, Stefan aus der Wiesche and Eugeny Y. Kenig
In numerous turbomachinery applications, e.g., in aero-engines with regenerators for improving specific fuel consumption (SFC), heat exchangers with low-pressure loss are required. Pil low-plate heat exchangers (PPHE) are a novel exchanger type and promi...
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Hitoshi Tanaka, Nguyen Xuan Tinh, Xiping Yu and Guangwei Liu
A theoretical and numerical study is carried out to investigate the transformation of the wave boundary layer from non-depth-limited (wave-like boundary layer) to depth-limited one (current-like boundary layer) over a smooth bottom. A long period of wave...
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Maria Graça Neves, Eric Didier, Moisés Brito and María Clavero
This paper presents a study of run-up/overtopping over a smooth impermeable dike with promenade using 2D and 3D mesh-based and mesh-free numerical models and results from 2D physical modelling for strong energetic incident waves. These waves induce plung...
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Hitoshi Tanaka, Nguyen Xuan Tinh and Ahmad Sana
The transitional flow regime of the bottom boundary layer under hypothetical shoaling tsunamis is investigated in the entire region from the tsunami source to the shallow sea area. In order to calculate the shoaling process of a tsunami, an analytical me...
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Alan Kabanshi
This paper explores the flow structure, mean/turbulent statistical characteristics of the vector field and entrainment of round jets issued from a smooth contracting nozzle at low nozzle exit velocities (1.39?6.44 m/s). The motivation of the study was to...
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Hitoshi Tanaka, Nguyen Xuan Tinh and Ahmad Sana
In order to improve the accuracy of the original full-range equation for wave boundary layer thickness, with special reference to increasing its applicability to tsunami-scale waves, a theoretical investigation is carried out to derive a dimensionless ex...
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Chunyu Guo, Hang Guo, Jian Hu, Kewei Song, Weipeng Zhang and Wei Wang
The deformation of the cylinder has been proved to greatly reduce the fluctuation of lift and the vortex-induced vibration. In this article, a new form of deformation mode for the smooth cylinder is proposed in order to reduce the vortex-induced vibratio...
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Beate Wörz, Mark Wieler, Viola Dehe, Peter Jeschke and Michael Rabs
This paper presents the results of integral heat transfer measurements taken in a square ribbed cooling channel configuration for evaluating heat transfer and turbulent flow characteristics in convective cooled gas turbine blades and draws a comparison w...
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Daniel B. Bung and Daniel Valero
As with most high-velocity free-surface flows, stepped spillway flows become self-aerated when the drop height exceeds a critical value. Due to the step-induced macro-roughness, the flow field becomes more turbulent than on a similar smooth-invert chute....
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