Theory 01/Reynolds Number/Aneurysms
Clot Onset Tracks Local Reynolds
The claim
Thrombosis in an aneurysm sac begins where the local Reynolds number passes a threshold, not where the artery is widest, so a small sac with fast flow clots before a large slow one.
01Mechanism
Above the threshold the flow becomes unstable and recirculating, which lengthens residence time in the sac and allows platelets to accumulate.
02Prediction
Thrombosis should track local Reynolds rather than diameter.
03Refutation
Thrombosis tracking sac size would remove the flow criterion.