Overview

TUFLOW AD (Advection Dispersion) is a module for simulating depth-averaged, two and one-dimensional constituent fate and transport. Both dissolved and particulate constituents can be simulated.

TUFLOW AD takes depth and velocity fields computed by the TUFLOW and ESTRY engines and uses this information, together with initial and boundary conditions, to simulate the advection and dispersion of constituents. TUFLOW AD is specifically oriented towards such analyses in systems including coastal waters, estuaries, rivers, floodplains and urban areas.

The TUFLOW AD 2D advection solution algorithm is based on the third order ULTIMATE QUICKEST method of Leonard (1991), Leonard & Niknafs (1991) and Leonard et al. (1993). It solves the full two-dimensional, depth averaged, constituent conservation equation, including sink terms such as settling (for particulate species) and decay. The continuity equation is used to ensure conservation of mass.

The scheme also includes representation of mixing due to sub-grid-scale turbulence and vertical shear via the dispersion formulation provided in Falconer et al. (2005). The TUFLOW AD scheme implements automatic sub-stepping to maintain stability, and has the capability to adaptively expand its computational stencil from third to ninth order if strong constituent gradients are identified.

Availability

TUFLOW AD is currently under beta release until March 2010.

Click here to send an enquiry regarding this release.

Documentation

Click here to download the draft manual.

Click here to download the TUFLOW AD product flyer.

Recent applications

Click on the following to download a project sheet for:



Example Animations

Eddy Shedding in High CFL Flows (All Model) (Requires access to YouTube)

Eddy Shedding in High CFL Flows (Zoom) (Requires access to YouTube)

Multiple Square Harbours (Based on Wu & Falconer (2000)) (Requires access to YouTube)