Speaker
Mr
Sankhadip Sengupta
(Undergraduate student,Aerospace Engineering,IIT Kharagpur,Kharagpur,India)
Description
This paper addresses the growing usages of high performance computing in modern
computational fluid dynamics to simulate the flow-induced vibrations of cylindrical
structures necessary to enhance the Reactor Safety in Nuclear plants. The study is
essential to prevent the damage of steam tubes causing an accident due to the release
of reactor coolant containing radioactive materials out of the reactor system. After
the accident of the SG tube rupture due to flow-induced vibration of the Mihama
Nuclear Power Station Unit II, preventive measures of the recurrence of a SG tube
rupture accident have been adopted. In this area of research, the computational
efficiency is a major concern. The aim of this paper is to develop means for writing
parallel programs and to transform shared-memory/sequential programs into distributed
programs, in an object-oriented environment; thus facilitating programmers to develop
parallel CFD codes to solve flow induced vibrations in Nuclear Reactors more quickly
and efficiently thus preventing damages and shut-offs as well as accidents. In this
approach, the programmer controls the distribution of programs through control and
data distribution. The authors have defined and implemented a parallel framework,
including the expression of object distributions, and the transformations required to
run a parallel program in a distributed environment. The authors provide programmers
with a unified way to express parallelism and distribution by the use of classes or
packages storing active and passive objects. The distribution of classes/packages
leads to the distribution of their elements and therefore to the generation of
distributed programs. The authors have developed a full prototype to write parallel
programs and to transform those programs into distributed programs with a host of
about 12 functions. This prototype has been implemented with the Java language, and
does not require any language extension or modification to the standard Java
environment. The parallel program is utilized by developing a CFD workbench equipped
with high end FEM unstructured mesh generation and flow solving tools enhancing easy
analysis of fluid-induced vibrations of circular cylindrical tubes as well as other
type of structures with an easy-to-use GUI implemented entirely on the parallel
framework.
Summary
The central point of this project is the development of a parallel framework for
developing FEM components ,FEM discretizations , adaptivity and multigrid solvers
and their realization in a software package as shown, which directly includes tools
for parallelism and hardware-adapted high-performance in low level kernel routines;
completely platform independent. It is the special goal in this project to realize
and to optimize the algorithmic concepts and to use them extensively for the solution
and investigation of flow-induced vibrations or fluid structure interactions thus
helping people to control Nuclear safety in plants .industrial zones etc.
Author
Mr
Sankhadip Sengupta
(Undergraduate student,Aerospace Engineering,IIT Kharagpur,Kharagpur,India)
Co-author
Prof.
Kalyan.P Sinhamahapatra
(Associate Professor,Aerospace Engineering,IIT Kharagpur,India)
