Wear mechanism of concrete pumping pipe under the conditions of multiphase fluid

In order to solve the abrasion of concrete pumping system under the condition of multiphase fluid which is highly nonlinear and non-continuous, an analytical method named the quasi-non-continuous flow numerical simulation was put forward, in which the incompressible ideal gas, calcium sulfate and calcium sulfide are used to simulate the multiphase flow in concrete pumping pipe. Each phase has its own momentum equation and continuity equation. The coupling coefficient of each phase is solved through pressure, volume exchange coefficient and surface coefficient. By the quasi-non-continuous flow numerical simulation, the wear mechanism of concrete pumping pipe under the condition of multiphase fluid was analyzed. From the tests, the quasi-non-continuous flow numerical simulation provides a quantitative engineering method to the design of concrete pumping pipe.