Mathematical model for calculating pressure in a pulsating combustion chamber

Pulsating Behaviour in Combustion Waves

ames. The models differ in their kinetic mechanisms, i.e. one-step and two-step chainbranching reaction schemes are considered here. It is shown that in these models there exists a variety of dynamical regimes of nonlinear wave propagation depending on the control parameters. These regimes include travelling waves, pulsating periodic waves, pulsating waves emerging due to the period-doubling bi...

Combustion Chamber for Aircraft

Combustion Chamber

AGAINST THE VALIDITY OF THE CLOSED SYSTEM MODEL FOR CALCULATING OSMOTIC PRESSURE

This paper criticizes the model and the new definition for osmotic pressure given by Parsafar et al. [J. Sci. I. R. Iran, Vol. 10, No. 4, 233 (1999)]. The model is a closed system containing 1 kg of solvent plus m mole of solute at constant temperature and under pressure P0 + ? where P0 is the standard pressure and ? is the osmotic pressure of the corresponding m molal solution. While the total...

A Mathematical Model for Flood Protection

Many regions in the world are protected against flooding by a dike, which may be either natural or artificial. We deal with a model for finding the optimal heights of such a dike in the future. It minimizes the sum of the investments costs for upgrading the dike in the future and the expected costs due to flooding. The model is highly nonlinear, nonconvex, and infinite-dimensional. Despite this...