CSTR /Continuous stirred-tank reactor (CSTR) is also known as a vat or back mix reactor, continuous-flow stirred-tank reactor, and mixed flow reactor. It is a chemical reactor in environmental engineering and chemical engineering. It is an open reactor where the material can enter or exit the system. The condition in the reactor never changes with time. From the entry point, reactants are continuously added, and the product is removed from the exit point. CSTR has uniform Properties like temperature, density, pressure, etc. throughout the reactor. The CSTR model works for all three phases, i.e., solid, liquid, and gas.
