UNCERTAINTY EVALUATION OF FLUID DYNAMIC SIMULATION WITH ONE-DIMENSIONAL RISER MODEL BY MEANS OF STOCHASTIC DIFFERENTIAL EQUATIONS

Uncertainty evaluation of the fluid dynamic simulations with one-dimensional model describing riser of a Fluid Catalytic Cracking type cold unit was carried out. Simulation of circulation flow by deterministic approach is taken as reference for uncertainty evaluation. Classical numerical formulation of problem is given as a matter of comparison. Stochastic formulation according to Euler-Maruyama and Euler-Heun's Methods of the fluid dynamic model is described. Solutions is discussed along with graphical presentation of results. Uncertainty as a stochastic data evaluation is presented.