Numerical analyses on optimizing a heat pipe thermal management system for lithium-ion batteries during fast charging

Assessment of hybrid RANS-LES formulations for flow simulation around the Ahmed body

The heat exchangers have a widespread use in industrial, transportation as well as domestic applications such as thermal power plants, means of transport, air conditioning and heating systems, electronic equipment and space vehicles. The key objectives of this article are to provide an overview of the published works that are relevant to the tube banks heat exchangers. A review of available and display that the heat transfer and pressure drop characteristics of the heat exchanger rely on many parameters. Such parameters as follows: external fluid velocity, tube configuration (in-line/staggered, series), tubes rows, tube spacing, fin spacing, shape of tubes, etc. The review also shows the finned and un-finned tube configurations heat exchangers. The important correlations for thermofluids in tube banks heat exchangers also discussed. The optimum spacing of tube-to-tube and fin-to-fin with fixed size (i.e., area, volume) with the maximum overall heat conductance (heat transfer rate) were summarized in this review. In addition, the few studies show the effect of tube diameter in a circular shape compared with elliptic tube shape. Overall, the heat transfer coefficient and pressure drop increases with increasing fluid velocity regardless the arrangement and shape of the tube. In the meantime, the other shape of tubes (such as flat or flattened) for finned and un-finned with the optimum design needs more research and investigation due to have lesser air-side pressure drop and improved air-side heat transfer coefficients. They have putted some the significant conclusions from this review.

An Overview on Thermal and Fluid Flow Characteristics in a Plain Plate Finned and Un-Finned Tube Banks Heat Exchanger

Reduced dissipation AUSM-family fluxes: HR-SLAU2 and HR-AUSM+-up for high resolution unsteady flow simulations

Assessment of various turbulence models (ELES, SAS, URANS and RANS) for predicting the aerodynamics of freight train container wagons

Assessment of RANS and DES methods for realistic automotive models

A set of simulations has been conducted on the 30P30N high-lift three-element airfoil using a hybrid Reynolds-averaged Navier?Stokes-large-eddy simulation (RANS?LES) method on multiblock structured and Cartesian-prismatic unstructured grids. These simulations using the SST-IDDES (improved delayed detached-eddy simulation) model have been shown to agree well with previous experimental and numerical investigations in terms of mean quantities, as well as spectra and flow structures. It has also been shown that results from a Cartesian-prismatic unstructured mesh generated in only a few days were able to predict both mean and instantaneous flow features to an acceptable level. However, there were clearly areas where improvements to the mesh, numerical scheme, and turbulence model could improve the correlation to both the experimental data and the multiblock structured mesh. It was demonstrated from the grids used in this study that IDDES exhibited a sensitivity to the near-wall meshing.

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Flow dynamics past a 30P30N three-element airfoil using improved delayed detached-eddy simulation

A comparison and assessment of approaches for modelling flow over in-line tube banks

The near-field of a jet-nozzle configuration of Mach 0.75 is simulated using Large Eddy Simulation (LES). The extraction of acoustic far-field is conducted using a permeable Ffowcs Williams-Hawkings (FW-H) integration recently implemented into the commercial CFD code, STAR-CCM+. Validation of numerical methods has been conducted a priori using decaying homogeneous isotropic turbulence (DHIT) and a flat plate boundary layer. Aerodynamic results and predicted sound pressure levels are both in good agreement with experiments and previous simulations. The predicted sound pressure levels using LES are within a 1-2 dB deviation for all measured observer locations.

Alastair West

Papers

Assessment of RANS and DES methods for realistic automotive models

Flow dynamics past a 30P30N three-element airfoil using improved delayed detached-eddy simulation

A comparison and assessment of approaches for modelling flow over in-line tube banks

Jet Noise Prediction using a Permeable FW-H Solver

Field Inversion and Machine Learning for turbulence modelling applied to three-dimensional separated flows