Previously we could only use a single soot precursor (C2H2, C16H10) as a nucleation parameter which led to lower predicted values of soot. The precursors then go on to ‘nucleate’ to form soot particles. These precursors are typically PAH of different forms such as A2, A2R5, A3, A3R5. The first step is formation of precursors via the chemical mechanism. The formation of soot forms via ‘precursors’ (see lower right hand image). This new feature has heavily improved soot modelling. Now, soot modelling using generalised precursor species is possible. The AMR ensures that the flame front is well resolved in this highly transient flame.

The model is compatible across all gas-phase reacting flow models.

The mesh near the flame front and the region of the flame front is adapted to ensure that it is well resolved, this leads to a 4x cell count reduction.

(2020.2) Reacting flowsĪnother mention of the model based refinement now being available for reacting flows. This time we will look at the remaining interesting news from the latest version. It this week’s blog post we will keep looking into the news of the latest Simcenter Star-CCM+ version.

Simcenter star