Gastric Emptying and Peristalsis (2D)

Meal

Food type

Physiology

Simulation speed 1.0×

Enterogastric (CCK) feedback gain 1.0×

Wave contraction strength 100%

Live Readout

Emptying rate

— mL/min

Emptied

In stomach

Duodenal fat signal

How this works

The stomach wall is a fixed radius-vs-height profile from cardia to pylorus. Peristaltic waves are traveling Gaussian contraction bumps that pinch the local radius as they sweep toward the pyloric sphincter, gating how wide it opens.

Particles below ~2 mm effective radius and inside an open gate pass into the duodenum with probability 1 − e^(−k·dt).
Particles that hit the wall bounce back (retropropulsion) and grind down by a per-food factor each collision.
Each duodenal arrival adds to a fat/acid signal that decays exponentially; a higher signal lowers pass-rate k and slows the wave interval — the enterogastric reflex, scaled by the feedback-gain slider.

Chyme particle Peristaltic wave Pyloric sphincter

🍜 Gastric Emptying and Peristalsis (2D)