Vascular Heat-Sink Effect — 2D Bioheat Map

Thermal tumor therapies — radiofrequency ablation, microwave ablation, regional hyperthermia — deposit heat at a target and rely on it staying hot long enough to cause thermal damage. But large blood vessels running near the target act as a built-in cooling system: fast-flowing blood carries heat away far more efficiently than the surrounding tissue can conduct it, clamping nearby cells close to normal body temperature no matter how much power the applicator delivers. This simulator solves the Pennes bioheat equation directly on a 2D grid and renders it as a live top-down heatmap — no 3D height-field standing in for it — alongside a cross-section profile and a coverage-history trace, so you can watch a vessel of adjustable position, diameter and flow strength carve a persistent cold streak through the heated zone and see exactly how much of the therapeutic target it costs.