👉 The Ia Fluid, also known as the Ia Liquid or Ia Viscosity Fluid, is a theoretical model in fluid dynamics proposed to explain the anomalous behavior of neutron stars, particularly their ultra-precise rotational stability. Named after its discoverer, John Archibald Wheeler, this fluid is characterized by its extremely low viscosity and near-zero shear stress, meaning it flows with minimal resistance. This property allows the neutron star's crust to rotate independently of its core, a phenomenon known as "glitching," where sudden increases in rotational speed occur. The Ia Fluid theory posits that the crust is composed of a lattice of neutrons and protons held together by a sea of superfluid neutrons, which exhibit frictionless flow. This model helps account for the observed rapid spin-ups in neutron stars, providing a plausible explanation for their unique rotational dynamics.
