Application of the QMOM in Research on the Behavior of Solid-liquid Suspensions

The population balance equation (PBE) is a continuity statement written in terms of the number density function. It describes, among others, the aggregation-breakage, nucleation and particle growth phenomena in solid-liquid suspensions. Fast and computationally inexpensive methods for solving the PBE are very much in demand today for computational fluid dynamics (CFD) simulations, industrial plants designs or scientific research. The Class Method (CM), Monte Carlo method (MC), method of moments (MOM) and its derivatives are the most popular solutions. In this work application of the Mathcad softwarefor the quadrature method of moments (QMOM) is shown. The Mathcad allows one to create a simple and clear algorithm which can be easily changed according to the user needs, e.g. in modification of an aggregation kernel mathematical formula. The program written can be readily run on a standard PC computer. To verify a correctness of calculations the appropriate measurements were made and an efficiency of the program created was compared with another one written in the Turbo Pascal language

Investigations on heat and momentum transfer in CuO-water nanofluid

This paper presents results of investigations on the application of CuO-water nanofluids for intensification of convective heat transfer. Performance of nanofluids with 2.2 and 4.0 vol.% CuO NPs (nanoparticles) content were examined with regard to heat transfer coefficient and pressure losses in case of turbulent flow in a tube. Negligible impact of examined nanofluid on heat transfer improvement was found. Moreover, measured pressure losses significantly exceeded those determined for primary base liquid. The observations showed that application of nanofluid for heat transfer intensification with a relatively high solid load in the examined flow range is rather controversial