Numerical modeling of water hammer with fluid–structure interaction in a pipeline with viscoelastic supports

摘要: Abstract In the paper a numerical approach to four equation model of water hammer (WH) with fluid–structure interaction (FSI) is presented. An algorithm for solution that in time domain based on method characteristics (MOC) proposed. Special attention paid modeling influence viscoelastic pipe supports. The boundary condition at support formulated as differential junction motion which solved numerically concurrently MOC compatibility equations. Numerical simulations were done use an own computer program. tests conducted real pipeline built lab and fastened specific, complex, supporting system. results compared experimental records after some calibration quite good agreement was achieved. Basic behaviors pressure identified existed discrepancies discussed explained. other physical tested preliminary analyzed straight fixed floor only Such design created possibility significant displacements supports thus allowing effective testing stiffness damping properties WH behaviors. specific initial conditions case formulated, implemented code. It found proper selection parameters may produce reduction amplitudes, mainly due energy absorption dissipation