A generalised version of an Ivantsov-based dendrite growth model incorporating a facility for solute measurement ahead of the tip

► Dendrite growth law with a facility for solute definition at a finite distance ahead of the tip. ► A dendrite growth model with a distinction between global and local undercooling at the tip. ► The aspect ratio of the dendrite is included. ► Demonstration using experimental synchrotron X-ray sequences for an Al-Ge alloy. ► A useful tool for investigating solidification during synchrotron radiography tests.