Separated calculation method for turbulence gain degree of water body under sparse water-sediment two-phase condition

The invention discloses a separation type calculation method for a water body turbulent energy gain degree under a sparse water-sediment two-phase condition, and belongs to the field of engineering computational fluid mechanics. The separation type calculation method comprises the following steps: introducing a positive gain inertia factor and a following factor to respectively represent the strengthening effect of particle inertia and a following behavior thereof on water body turbulent energy; a negative gain inertia factor and a following factor are introduced to respectively represent the particle inertia and the dissipation effect of the following behavior of the particle inertia on the turbulent energy of the water body; determining a water body positive gain degree based on the positive gain inertia factor and the following factor, and determining a water body negative gain rate based on the negative gain inertia factor and the following factor; after the positive gain degree and the negative gain rate