HELYX-Hydro is an extension module for HELYX featuring a specialised two-phase VOF type solver originally developed by the Council for Scientific and Industrial Research (CSIR) in South Africa. This solver add-on package is ideal for modeling violent tank sloshing, cryogenic sloshing, microgravity and microfluidics, liquid transport (marine and air) and coastal structures.

Why HELYX-Hydro?

HELYX-Hydro relies on the 2nd order Crank-Nicolson, HiRAC interface capturing scheme to provide a highly accurate representation of the free-surface between immiscible fluid phases. Together with an improved pressure-interpolation scheme, this method has proven to reduce both spurious dissipation and parasitic currents on non-orthogonal grids when compared to the standard multi-dimensional limiter for explicit solution (MULES) algorithm.

HELYX-Hydro also features advanced thermal capabilities, including heat-mass transfer and liquid film evaporation between discrete liquid and gas phases.

Other key features provided with HELYX-Hydro include, but are not limited to:

Efficient handling of heterogeneous porous fields.
Accounting for gas compressibility in the low-Mach number regime.
Improved coupling algorithm for FSI problems.
Effective handling of multiple regions in the mesh.

HELYX-Hydro tank sloshing under violent shaking conditions.


HELYX-Hydro thermal capabilities. Droplet on heated plate: Leidenfrost phenomenon (test case created by C. Kunkelmann & S. Batzdorf, TTD-TUD).



Oxtoby O. and Heyns J.A., "A solver for free-surface flow in heterogeneous porous media", OFW9 2014.

Heyns J.A., Oxtoby O. and Suliman R., "Modelling dynamic liquid-gas systems: Extensions to the volume-of-fluid solver", OFW8 2013.

Heyns J.A., Oxtoby O. and Suliman R., "A finite-volume solver for two-fluid flow in heterogeneous porous media based on OpenFOAM". OSCFD 2013.

Want to Buy?

The solvers in HELYX-Hydro are released under the GNU General Public License for the benefit of the end-user. For further information about HELYX-Hydro features, availability and prices, please contact us today or speak to one of our local sales representatives.

We use cookies in this website in accordance with our Cookie Policy. By using this website, you consent to our use of cookies.
I'm OK With Cookies Cookie Settings ?