scholarly journals Towards optimum additive performance: A numerical study to understand the influence of roughness parameters on the zinc dialkyldithiophosphates tribofilm growth

2020 ◽  
Vol 33 (1) ◽  
pp. 1-14
Author(s):  
Yuechang Wang ◽  
Abdel Dorgham ◽  
Ying Liu ◽  
Chun Wang ◽  
Ali Ghanbarzadeh ◽  
...  
Keyword(s):  
Numerical Study ◽  
Roughness Parameters ◽  
Zinc Dialkyldithiophosphates

Directional Evaluation of Surface Topography Parameters and Dry Friction

2014 ◽  
Author(s):  
Matthias Wangenheim
Keyword(s):  
Surface Roughness ◽  
Surface Topography ◽  
Dry Friction ◽  
Numerical Study ◽  
The Other ◽  
Roughness Parameters ◽  
Surface Parameters ◽  
Large Influence ◽  
Finishing Processes ◽  
Counter Surface

Surface topography parameters commonly used do not give information on directional structures on a technical surface, that originate e.g. from manufacturing and finishing processes. On the other hand these sturctures might show large influence on the friction behaviour of these surfaces. A numerical study is performed with an unlubricated dynamic sealing contact, which is e.g. utilized in vacuum applications: These results are compared to directional evaluation of surface parameters. It is shown, that surface roughness parameters commonly used are neither appropriate to predict the level of friction on technical surfaces nor can they give information on directional properties of a counter surface.

scholarly journals A numerical study of the statistics of roughness parameters for fluctuating interfaces

2021 ◽  
Author(s):  
Sebastian Bustingorry ◽  
Jill Guyonnet ◽  
Patrycja Paruch ◽  
Elisabeth Agoritsas
Keyword(s):  
Numerical Study ◽  
Roughness Parameters ◽  
Fluctuating Interfaces

Numerical study of the low-frequency atomic dynamics in a Lennard-Jones glass

1998 ◽  
Vol 77 (2) ◽  
pp. 473-484 ◽  
Author(s):  
M. Sampoli, P. Benassi, R. Dell'Anna,
Keyword(s):  
Numerical Study ◽  
Low Frequency ◽  
Lennard Jones

Numerical simulation of the tree higro-thermal response in forest fire environment

2020 ◽  
pp. 57-65
Author(s):  
Eusébio Conceiçã ◽  
João Gomes ◽  
Maria Manuela Lúcio ◽  
Jorge Raposo ◽  
Domingos Xavier Viegas ◽  
...  
Keyword(s):  
Forest Fire ◽  
Numerical Study ◽  
Thermal Response ◽  
View Factor ◽  
Tree Model ◽  
Pine Tree ◽  
Surface Temperatures ◽  
Fire Environment ◽  
Fire Front ◽  
Heat Exchanges

This paper refers to a numerical study of the hypo-thermal behaviour of a pine tree in a forest fire environment. The pine tree thermal response numerical model is based on energy balance integral equations for the tree elements and mass balance integral equation for the water in the tree. The simulation performed considers the heat conduction through the tree elements, heat exchanges by convection between the external tree surfaces and the environment, heat exchanges by radiation between the flame and the external tree surfaces and water heat loss by evaporation from the tree to the environment. The virtual three-dimensional tree model has a height of 7.5 m and is constituted by 8863 cylindrical elements representative of its trunks, branches and leaves. The fire front has 10 m long and a 2 m high. The study was conducted taking into account that the pine tree is located 5, 10 or 15 m from the fire front. For these three analyzed distances, the numerical results obtained regarding to the distribution of the view factors, mean radiant temperature and surface temperatures of the pine tree are presented. As main conclusion, it can be stated that the values of the view factor, MRT and surface temperatures of the pine tree decrease with increasing distance from the pine tree in front of fire.

NUMERICAL STUDY FOR THAILAND: MATHEMATICAL MODEL OF PRODUCTION AND LOGISTIC PLANNING FOR SUGARCANES USED IN BIOFUEL PRODUCTION

2013 ◽  
Author(s):  
Pancheewa Benjamasutin ◽  
◽  
Ponthong Rijana ◽  
Phongchayont Srisuwan ◽  
Aussadavut Dumrongsiri
Keyword(s):  
Mathematical Model ◽  
Numerical Study ◽  
Biofuel Production ◽  
Logistic Planning

NUMERICAL STUDY OF PRODUCTION, LOGISTICS AND FACILITY LOCATION PLANNING FOR OIL PALM IN BIO-DIESEL PRODUCTION FOR THAILAND

2013 ◽  
Author(s):  
Artchapong Hassametto ◽  
Preerawadee Chaiboontun ◽  
Chattraporn Prajuabwan ◽  
Laphatrada Khammuang ◽  
Aussadavut Dumrongsiri
Keyword(s):  
Facility Location ◽  
Oil Palm ◽  
Numerical Study ◽  
Location Planning ◽  
Production Logistics ◽  
Diesel Production
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