Abstract
The present paper deals with the numerical simulation of a coupled non linear fluid-structure problem by explicit coupling between a finite element structure code and a finite volume fluid code. This numerical study is carried out in order to develop robust and general coupling with FE and CFD commercial code for industrial applications. A geometrically simple non linear coupled problem is presented in order to validate the numerical approach. The structure non linear problem is solved with a finite element technique, using a iterative implicit algorithm for time integration. The fluid problem is solved using standard numerical techniques (finite volume approach, implicit splitting operator scheme). The whole coupled problem is solved with a commercial CFD code: a dedicated FE structure code is developed in the CFD code together with coupling (in time, in space) procedures. The proposed method is validated in the case of a incompressible inviscid fluid, for which the coupled problem is solved with an analytical solution. The present study gives a reference test case for a full scale fluid-structure model. Industrial applications can now be considered by coupling commercial FE and FV codes with general coupling code.
Highlights
The present paper deals with the numerical simulation of coupled Ouid-structure problem, in which the coupling process is bases on mechanical exchanges between each sub-problem. ln the present study ot her fluid-structure coupling phenomena, such as them1al effect, are not taken into account
At th e fluid structure interface, fluid and structure arc coupled via fluid forces and structure displacement, as sketched by Fig. I
From the industrial point of view, an investigation of the various aspecrs of the numerical fluid-strucrure coupling on a simple case is necessary before considering a full-scale coupling with existing commercial codes for industria l structure de sign
Summary
The present paper deals with the numerical simulation of coupled Ouid-structure problem, in which the coupling process is bases on mechanical exchanges between each sub-problem. ln the present study ot her fluid-structure coupling phenomena, such as them1al effect, are not taken into account. The present paper deals with the numerical simulation of coupled Ouid-structure problem, in which the coupling process is bases on mechanical exchanges between each sub-problem. Ln the present study ot her fluid-structure coupling phenomena, such as them1al effect, are not taken into account. The numerical approach tends to propose general coupling algorithms with specific solvers for each sub-problems, with various coupling strategies [5] [8] [17) [20], depending on the phys ical coup ling phenomenon. From the industrial point of view, an investigation of the various aspecrs of the numerical fluid-strucrure coupling on a simple case is necessary before considering a full-scale coupling with existing commercial codes for industria l structure de sign. The fluid-structure coupled problem studied in the present paper is described by Fig. 2'.
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