Compare two chambers: The blue microcapsule reacts quickly; amber is slower. Each has its own permeability and elastic stiffness. Both see the same well-mixed bath.
Interact: Drag the 3D scene to orbit; use the wheel to zoom; click either half to select. Choose a protocol or change bath concentration while running. A +60 mOsm/L bath pulse changes the chemical gradient instantly. Pause, step, and reset are fully functional.
Physics: Δπ = σRT(Cᵢ−Cₑ), and dV/dt = Lₚ A (Δπ−Pₑ). The initial solute amount is stored at reset; dN/dt = Pₛ A(Cₑ−Cᵢ). Elastic pressure uses an effective linear radial law.
Limits: Illustrative elastic polymer microcapsules. Not a biological cell simulator, medical model, or exact constitutive theory of lipid membranes. No mixing gradients, electrical effects, or fluid inertia.