In the lift correction model proposed by Montoya [1], the lift force is damped in the bulk flow region, where other lift coefficient models are no longer accurate due to empirical limitations producing unphysical accumulation and peaks of the vapor volume fraction. The Montoya lift correction is formulated as:

(15–2)

where is the Eotvos number, is void fraction of the gaseous phase, and is the corrected lift coefficient.

The Montoya lift coefficient correction eliminates the unphysical void peaks of the vapor volume fraction and improves the accuracy of simulations that involve large deformable bubbles and radial and axial distributions of the void fraction in a gas phase. It is suitable for bubbly, cap, churn, slug, and annular flows.

The Montoya lift correction can be used in conjunction with the Shaver-Podowski lift correction for an overall improvement of lift coefficient predictions for both wall and bulk regions in gas-liquid flows.

After enabling beta feature access (Introduction), you can select Montoya Lift Correction in the Global Options group box of the Multiphase Model dialog box (Phase Interaction > Forces tab).

This correction is available for the Eulerian multiphase model only and can be used together with the Shaver-Podowski Lift Correction to improve the accuracy of lift coefficient predictions for both wall and bulk regions in gas-liquid flows. For the theory behind this model, see Theory.

Alternatively, you can enable this option using the following text command:

/define/phases/set-domain-properties/interaction-domain/forces/lift/> lift-montoya?
Use the Montoya Lift Correction? [no] y