About 2010 CFM Lab.
Objectives
A new approach to solve actual phenomenon by assuming them as a complex phenomena is now attracting attentions of reseachers in the field of Engineering and Science. Fluid dynamics is one of the typical such phenomena which has been studied widely in the experimental or theoritical way. As the great advancement of computers in the past decades, a new approach to study fluid dynamics was appeared in this field. This approach is called Computational Fluid Dynamics (CFD) or numerical simulation and successfully used to obtain the information of fluid by using supercomputers. To expand the CFD methods into the actual engineering fields, CFD has to deal with various phenomenon such as turbulence, gas-liquid flow, combustion, acousmato and fluid vibration. These phenomenon have great influence to the fluid dynamics and often cause engineering problems. So we have to develop CFD tools which can solve fluid dynamics with these additional phenomenon. In order to develop an efficient CFD tools, wide variety of knowledges such as mathmatics, physics and information technologies are needed.
We have been studying innovative models for CFD and developing the CFD tools which can be applyed to the actual engineering field. The Large Eddy Simulation (LES) is the most basic approach we have used to simulate unsteady and three-dimensional fields because of its scalabilities into the actual engineering problems. We have developed various models on the LES code. New codes obtained as a result of our researches have been added into one enormous program named FrontFlow/red. To produce the useful tools in the engineering, we study (i) actual and complex flow and (ii) evaluate the accuracy and authority of FrontFlow/red. As an engineering tools, FrontFlow/red aims to (a) analyze the engineering problems, (b) estimate the criteria of design and (c) predict the engineering instruments.
The development of FrontFlow/red
We have developed FrontFlow/red which based on the LES techniqes to apply our research into the actual engineering. FrontFlow/red is based on the turbulent and unsteady three dimensional techniques and which can solve reactive flow, multiphase flow and coupled problems of material and flow. The most largest problem FrontFlow/red has been applyed in the past is one hundred million computational cells. To be used in the engineering fields in the future, FrontFlow/red has been applyed in the various problems for the actual proof in our laboratory.
FrontFlow/red has been sponsored by the ministry of education, culture, sports, science and technology-Japan. The development has been continued as part of "Frontier Simulation Software for Industrial Science" and "Revolutionary Simulation Software" . FrontFlow/red is open to the public as a result of this project and is free to all. Anybody can download FrontFlow/red from this website.
Reseaches
Three groups are studying each research fields in charge. All members in this laboratory belong to one of the groups. There are Combustion Group, Aerodynamic Group , Fuell Cell Group and High-Enthalpy Groupin 2013.
Combustion Group
Combustion Group is studying turbulent combustion. This group is building new computational models of combustion which is also applyed to the actual engineering instruments by other members. The themes in this group is listed below.
Aerodynamic group is studying the unsteady motions by using ALE methods. The objectives is vehicle, sphere and athlete of ski jump.
Fuel Cell group is studying the relations between flow and performance inside the actual fuel cells.
In the high enthalpy group, we research various problems around re-entry vehicles when it enters the atmosphere and heat-resistant materials etc.
A new approach to solve actual phenomenon by assuming them as a complex phenomena is now attracting attentions of reseachers in the field of Engineering and Science. Fluid dynamics is one of the typical such phenomena which has been studied widely in the experimental or theoritical way. As the great advancement of computers in the past decades, a new approach to study fluid dynamics was appeared in this field. This approach is called Computational Fluid Dynamics (CFD) or numerical simulation and successfully used to obtain the information of fluid by using supercomputers. To expand the CFD methods into the actual engineering fields, CFD has to deal with various phenomenon such as turbulence, gas-liquid flow, combustion, acousmato and fluid vibration. These phenomenon have great influence to the fluid dynamics and often cause engineering problems. So we have to develop CFD tools which can solve fluid dynamics with these additional phenomenon. In order to develop an efficient CFD tools, wide variety of knowledges such as mathmatics, physics and information technologies are needed.
We have been studying innovative models for CFD and developing the CFD tools which can be applyed to the actual engineering field. The Large Eddy Simulation (LES) is the most basic approach we have used to simulate unsteady and three-dimensional fields because of its scalabilities into the actual engineering problems. We have developed various models on the LES code. New codes obtained as a result of our researches have been added into one enormous program named FrontFlow/red. To produce the useful tools in the engineering, we study (i) actual and complex flow and (ii) evaluate the accuracy and authority of FrontFlow/red. As an engineering tools, FrontFlow/red aims to (a) analyze the engineering problems, (b) estimate the criteria of design and (c) predict the engineering instruments.
The development of FrontFlow/red
We have developed FrontFlow/red which based on the LES techniqes to apply our research into the actual engineering. FrontFlow/red is based on the turbulent and unsteady three dimensional techniques and which can solve reactive flow, multiphase flow and coupled problems of material and flow. The most largest problem FrontFlow/red has been applyed in the past is one hundred million computational cells. To be used in the engineering fields in the future, FrontFlow/red has been applyed in the various problems for the actual proof in our laboratory.
FrontFlow/red has been sponsored by the ministry of education, culture, sports, science and technology-Japan. The development has been continued as part of "Frontier Simulation Software for Industrial Science" and "Revolutionary Simulation Software" . FrontFlow/red is open to the public as a result of this project and is free to all. Anybody can download FrontFlow/red from this website.
Reseaches
Three groups are studying each research fields in charge. All members in this laboratory belong to one of the groups. There are Combustion Group, Aerodynamic Group , Fuell Cell Group and High-Enthalpy Groupin 2013.
Combustion Group
Combustion Group is studying turbulent combustion. This group is building new computational models of combustion which is also applyed to the actual engineering instruments by other members. The themes in this group is listed below.
- Numerical approach to predict the production of NOx
- Two scalar approach for the new model of combustion
- Numerical approach for the rocket combustion chamber
- Analysis of droplet breakup by using LBM method
Aerodynamic group is studying the unsteady motions by using ALE methods. The objectives is vehicle, sphere and athlete of ski jump.
- Crosswind stability of vehicle
- Unsteady analysis of vehicle using ALE method
- Numerical analysis of ski jumper
- Influence of unsteady motion of a sphere
Fuel Cell group is studying the relations between flow and performance inside the actual fuel cells.
- Mass transfer analysis of fuel cell
- Theoritical study of nonlinear acoustic fields
In the high enthalpy group, we research various problems around re-entry vehicles when it enters the atmosphere and heat-resistant materials etc.
- Aerodynamic and aerodynamic heating simulation of inflatable re-entry vehicle
- Simulation of electromagnetic wave around re-entry vehicle
- Analysis of plasma flow in the high enthalpy wind tunnel
- Supercomputer SR16000 (University of Hokkaido)
- Supercomputer SR16000,FX10 (University of Tokyo)
- Supercomputer system JSS (Japan Aerospace Exploration Agency)
- Cluster calculation systems (Opteron 16CPU)
Facilities
Supercomputers in many organizations in Japan are used in this laboratory for each reseachs. All students in our laboratory can use needed CPU cost thanks to these machines.