Numerical Simulation of Flash Boiling Effect in a 3-Dimensional Chamber Using Computational Fluid Dynamic Techniques

2016 ◽  
Vol 29 (1) ◽  
Keyword(s):  
Numerical Simulation ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
3 Dimensional ◽  
Dynamic Techniques ◽  
Flash Boiling

The Improved Research of the Defrosting of an Automobile Windshield

2012 ◽  
Vol 215-216 ◽  
pp. 42-45
Author(s):  
Tai Ming Huang ◽  
Wei Ke An ◽  
Jing Yin Tan ◽  
Yong Zhou
Keyword(s):  
Numerical Simulation ◽  
Computational Fluid Dynamic ◽  
Simulation Analysis ◽  
Fluid Dynamic ◽  
Left And Right ◽  
Cfd Numerical Simulation

The defrosting is very important in vehicle. In the paper, some improved proposals to the lack performance of the vehicle windshield defrosting would be discussed by using computational fluid dynamic (CFD) numerical simulation analysis and experiment to validate the improved proposal. The improved proposal including change the angle of the grill of wind outlet, and add grill on the left and right side. The discrepancy of the two methods is in 5%, which is acceptable. By the improved proposal that the windshield defrosting area is increased and also the requirements is satisfied.

scholarly journals Turbulent and Transitional Modeling of Drag on Oceanographic Measurement Devices

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
J. P. Abraham ◽  
J. M. Gorman ◽  
F. Reseghetti ◽  
E. M. Sparrow ◽  
W. J. Minkowycz
Keyword(s):  
Global Warming ◽  
Drag Coefficient ◽  
Computational Fluid Dynamic ◽  
Rate Equation ◽  
Fluid Dynamic ◽  
Heat Content ◽  
Fall Rate ◽  
Dynamic Techniques ◽  
Measurement Devices

Computational fluid dynamic techniques have been applied to the determination of drag on oceanographic devices (expendable bathythermographs). Such devices, which are used to monitor changes in ocean heat content, provide information that is dependent on their drag coefficient. Inaccuracies in drag calculations can impact the estimation of ocean heating associated with global warming. Traditionally, ocean-heating information was based on experimental correlations which related the depth of the device to the fall time. The relation of time-depth is provided by a fall-rate equation (FRE). It is known that FRE depths are reasonably accurate for ocean environments that match the experiments from which the correlations were developed. For other situations, use of the FRE may lead to depth errors that preclude XBTs as accurate oceanographic devices. Here, a CFD approach has been taken which provides drag coefficients that are used to predict depths independent of an FRE.

Numerical Simulation of Nanofluids for Improved Cooling Efficiency in Microchannel Heat Sink

2014 ◽  
Vol 695 ◽  
pp. 403-407 ◽  
Author(s):  
Nur Hazwani Mohamad Noh ◽  
Nor Azwadi Che Sidik
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Heat Sink ◽  
Rectangular Cross Section ◽  
Fluid Dynamic ◽  
Constant Heat Flux ◽  
Working Fluid ◽  
Microchannel Heat Sink ◽  
Rectangular Microchannel ◽  
3 Dimensional

Numerical simulation on 3-dimensional rectangular cross section of microchannel heat sink is conducted to investigate the effect of various type coolant consist of water and different type of nanofluids on the cooling performance of microchannel heat sink. FLUENT, a Computational Fluid Dynamic (CFD) is used as the solver of simulation. A rectangular microchannel with hydraulic diameter of 86um and length of 10mm under the boundary condition of constant heat flux and laminar flow with uniform inlet velocity with five sets of working fluid with different nanofluids. The defined model is validated with previous studies of numerical analysis. Results of present work show that using Diamond-H2O as cooling lead to higher efficiency of heat transfer in microchannel heat sink in comparison to others nanofluid and base fluid. Numerical results show that increasing the thermal conductivity of working fluid can enhanced heat transfer. Nusselt number follows the incremental in Reynolds number.

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