Withdrawal: Comparative Analysis of a Diverterless Supersonic Inlet and its Proposed Modified Geometry using Computational Fluid Dynamics

2020 ◽  
Author(s):  
Abdul Ahad Afzal ◽  
Muhammad Muneeb Safdar
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Comparative Analysis ◽  
Supersonic Inlet

Resistance Predictions for Asymmetrical Configurations of High-Speed Catamaran Hull Forms

2015 ◽  
Author(s):  
Srikanth Asapana ◽  
Prasanta K. Sahoo ◽  
Vaibhav Aribenchi
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Comparative Analysis ◽  
High Speed ◽  
Public Domain ◽  
Literature Survey ◽  
Historical Background ◽  
Resistance Analysis ◽  
Separation Ratio ◽  
Hull Forms

This paper attempts to undertake a comparative analysis of resistance characteristics between newly developed asymmetrical catamaran hull forms which were derived from existing conventional NPL series of round bilge catamaran hull forms by Molland, Wellicome and Couser (1994). A set of asymmetrical catamaran hull forms with waterline length of 1.6 m with a separation ratio (s/L) of 0.4 were generated by using standard modelling software. The resistance analysis had been carried out by using STAR CCM+, a computational fluid dynamics package for Froude numbers of 0.25, 0.30, 0.60, 0.80 and 1.0. Literature survey indicates that there is scant historical background in public domain to perform resistance analysis on asymmetrical catamaran hull forms. As this is not feasible due to lack of data in areas that were considered crucial, separate resistance analysis is carried out for each hull configuration. Finally, the compared resistance results will attempt to conclude whether asymmetrical catamaran hull forms are more efficient than the conventional catamaran hull forms.

scholarly journals Simulation Study of Air Conditioning System Location in Commercial Kitchen

2020 ◽  
Vol 10 (10) ◽  
pp. 57-61
Author(s):  
Mohammed Juma Al Areimi ◽  
Anbu Clemensis Johnson
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Comparative Analysis ◽  
Air Conditioning ◽  
Side Wall ◽  
Air Conditioning System ◽  
Cooking Process ◽  
Summer Temperatures ◽  
Air Circulation ◽  
Very High

Working in a commercial kitchen in restaurants and hotels is physically challenging. In the Middle East, summer temperatures are very high and require proper ventilation and air conditioning for comfortable working. In the current study a typical kitchen with dimensions 5 m × 4 m × 3 m, with heat source and range hood is modelled using computational fluid dynamics software. A comparative analysis was conducted on the location of the air conditioning system in the kitchen space. The investigated locations of the air conditioning system were on the kitchen side wall and ceiling. The results of the simulation showed that placing the air conditioning system in the ceiling at the centre of the kitchen produced better air circulation. The air flow close to the hood had sufficient velocity to remove heat, contaminants and CO2 generated from the cooking process

Experimental Study on Stirring Wind-Heating Devices

2014 ◽  
Vol 953-954 ◽  
pp. 419-423
Author(s):  
Jian Zhu Zhao ◽  
Qing Miao Liu ◽  
Feng Chen Wang ◽  
Mei Yuan ◽  
Shao Jiong Huang
Keyword(s):  
Fluid Dynamics ◽  
Experimental Study ◽  
Computational Fluid Dynamics ◽  
Comparative Analysis ◽  
Clean Energy ◽  
Experimental Conditions ◽  
Heating Efficiency ◽  
Cfd Models ◽  
Heating Device ◽  
Computational Fluid Dynamics Cfd

To improve the using efficiency of clean energy, in this investigation, three wind-heating devices, nonlayered-stirring heating device, layered-stirring heating device and layered extruded stirring heating device, were designed, fabricated and tested. The performance of these three devices was investigated experimentally. Results show that, under the experimental conditions, the layered extruded stirring heating device is the most efficient, and its heating efficiency reaches 46.4%. Then, the computational fluid dynamics (CFD) models were established base on these three devices. The comparative analysis of the simulation and experimental results, both obtained consistent heating law. This suggests that the use of the software CFD simulating the stirring heating device is feasible.

Coupled Thermal and Fluid Mechanical Modeling of a High Speed Motor Spindle

2017 ◽  
Vol 871 ◽  
pp. 161-168
Author(s):  
Lukas Koch ◽  
Julian Müller ◽  
Gordana Michos ◽  
Johannes Paulus ◽  
Markus Hubert ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Finite Element Method ◽  
Computational Fluid Dynamics ◽  
Finite Element ◽  
Comparative Analysis ◽  
Simulation Model ◽  
High Speed ◽  
Simulation Models ◽  
Mechanical Analysis ◽  
Mechanical Modeling

The objective of this survey is to evolve a better understanding of the complex thermal interactions inside a motor spindle. Therefore, the thermal behavior is investigated based on a simulation model and experiments. In contrast to existing simulation models, which either performed a complex thermal examination or an elaborate flow-mechanical analysis, a thermal (Finite Element Method) and fluid mechanical (Computational Fluid Dynamics) coupled simulation model was developed. Based on a comparative analysis, the usability of the currently available boundary conditions is scrutinized.

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