1989 Volume 33 Pages 163-168
TUBE MODEL, a surcharged flow simulation model in urban sewer pipe systems, is presented. A highly deformable sewer pipe is used in which the pipe wall has a nonlinear elastic relationship. One of the principal parameters of the model, β, that is a variable indicating the degree of nonlinear elasticity of the pipe wall, is determited comparing the flow equations of TUBE MODEL and LATERAL MODEL that is a fundamental and realistic model of surcharged flow. It is derived that a pressure-wave celerity of surcharged flow in TUBE MODEL nealy equals to that in LATERAL MODEL. Numerical experiments are carried out and the adaptabilities of TUBE MODEL are investigated comparing the simulated results by the two models.
