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YANG Chao
College of Mechanical Science
and Engineering,
Huazhong University of Science
and Technology,
Wuhan 430074, China
School of Mechatronic Engineering,
East China Jiaotong University,
Nanchang 330013, China
YI Menglin
College of Mechanical Science
and Engineering,
Huazhong University of Science
and Technology,
Wuhan 430074, China
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NUMERICAL SOLUTION OF
FLUID-STRUCTURE INTERACTION
IN LIQUID-FILLED PIPES BY
METHOD OF CHARACTERISTICS
Abstract: Fluid-structure interaction
(FSI) is essentially a dynamic phenomenon and always exists in
fluid-filled pipe system. The four-equation model, which has
been proved to be effective to describe and predict the
phenomenon of FSI due to friction coupling and Poisson coupling
being taken into account, is utilized to describe the FSI of
fluid-filled pipe system. Terse compatibility equations are
educed by the method of characteristics (MOC) to describe the
fluid-filled pipe system. To shorten computing time needed to
get the solutions under the condition of keeping accuracy
requirement, two steps are adopted, firstly the time step t and
divided number of the straight pipe are optimized, secondly the
mesh spacing z close to boundary is subdivided in several
submeshes automatically according to the speed gradient of
fluid. The mathematical model and arithmetic are validated by
comparisons between simulation solutions of two straight pipe
systems and experiment known from literature.
Key words:
Fluid-structure interaction Method of
characteristics Coupling
Fluid-filled pipe system Optimization |