Explo 5 software

EXPLO5 is thermochemical computer program that predicts the performance of ideal high explosives, propellants, and pyrotechnic mixtures on the basis of chemical formula, heat of formation, and density. As such, EXPLO5 is a useful tool in synthesis, formulation, and numerical modelling of energetic materials.

Explo 5 software

EXPLO5 calculates equilibrium composition and thermodynamic properties of state of products species at a specified temperature and pressure applying the free energy minimization techniques. These data, together with the Chapman-Jouguet detonation theory, enable calculation of detonation parameters such as detonation velocity, detonation pressure, detonation energy, etc.

From the equilibrium composition and thermodynamic parameters of state along the isentropic expansion the program calculates the coefficients in Jones- Wilkins-Lee (JWL) equation of state by a JWL fitting program built in, and energy available for performing mechanical work. By combining thermodynamic properties of the products and conservation equations under constant pressure combustion conditions, the program predicts theoretical rocket performance (specific impulse, thrust coefficient, flow velocity, etc.), as well as the specific energy (or force, impetus) under constant volume combustion conditions.

The program uses the Becker-Kistiakowsky-Wilson (BKW),  modified Becker-Kistiakowsky-Wilson,  and EXP-6 equations of state for gaseous detonation products, the ideal gas and virial equations of state of gaseous combustion products, and the Murnaghan equation of states for condensed products.

The current version of EXPLO5 program (Version V6.03) has significant improvements over the previous (V6.02). The most important improvement in the V6.03 version is incorporation of new equations state:  Exp-6 EOS, based on the statistical mechanical theories and Exp-6 potential (instead of JCZ3 EOS), and so-called Modified BKW EOS. Thanks to these, the accuracy of prediction of detonation parameters has been considerable improved.

The important characteristic of the program is possibility to treat a larger number of chemical elements that constitute reactants. The Database includes 35 elements: C, H, N, O, Al, Cl, Si, F, B, Ba, Ca, Na, P, Li, K, S, Mg, Mn, Zr, Mo, Cu, Fe, Ni, Pb, Sb, Hg, Be, Ti, I, Xe, U, W, Sr, Cr, and Br. This makes EXPLO5 capable of predicting detonation and combustion performance of wide variety of high explosives, propellants, and pyrotechnic formulations.


EXPLO5’s Database is updated with new reactants and products – it contains now around 350 reactants, more than 600 products (including different phases of the same product). The Database access can be customized for multiple users on one computer, and can be easily manipulated (add/remove/modified reactants and products).

order of the questions about Explo 5 software

OZM Explosives testing instruments Explo 5 software
OZM Research s.r.o.