Models explain changes in cooking meat

The insights gathered by the team could have numerous advantages, such as improvements in the safety regulations which govern the meat we consume; optimisations its quality and flavour; and new ways to maximise its shelf life to ensure minimal wastage. In the team's model, the cooking process heated the fluid unevenly, causing it to move around and deform the protein matrix. In turn, the movement of the fluid is itself altered by this distortion. The result demonstrates a fairly strong agreement with real observations -- where moisture is partially evaporated but is also pushed inwards from the meat surface during heating, causing the middle to swell.

Nelson and colleagues based their model on fundamental principles of conservation of mass, energy and momentum. They derived equations describing how polymers will behave when mixed with molecules of liquid, then fine-tuned their model's parameters until it was as realistic as possible. They then compared the outcomes of their simulations with experimental measurements of how thin steak slices shrink when cooked in the oven. In future studies, the team hopes to extend their simulations to 3D models. This would require far more computing power, but if achieved, could raise our level of understanding about the important food source.