Jakub M. Gac

Analytical investigation and numerical modeling of collisions between a droplet and a fiber

The kinetics of the collisions between droplet and the fiber is being studied in both theoretical and numerical way. During theoretical investigations the balances between the various components of total energy of the droplet have been used. As a result, we have obtained the conditions (expressed in terms of non-dimensional parameters characterizing the system) at which the deposition of the droplet on the fiber or the separation of the droplet from the fiber occurs. The results of theoretical computation have been compared with the results of the numerical simulations using the two-color lattice-Boltzmann method.

A Simple Numerical Model of Pressure Drop Dynamics During the Filtration of Liquid Aerosols on Fibrous Filters

We present a new numerical model of filtration of liquid aerosols on fibrous filters. The main goal of the model is to describe the dependence of pressure drop on time during the nonstationary filtration process. The main difference between the current model and others present in the literature is that it contains very few parameters—in its minimal form only two—and still describes the results of experimental measurements with a very good accuracy. We also estimate the dependence of the parameters of the model on the process conditions (i.e., gas flow velocity and the geometrical parameters of the filter) which enable the use of the presented model to predict the filtration process evolution in any fibrous filters.

A large eddy based lattice-Boltzmann simulation of velocity distribution in an open channel flow with rigid and flexible vegetation

The large eddy simulation method, based on a lattice-Boltzmann algorithm, was used to compute the vertical velocity profile in an open channel flow with submerged and emerged vegetation. The numerical method is characterized by the relatively short time of computation and low complexity. On the other hand, it allows a more realistic description of the vegetation properties relative to the methods commonly used in 1-D numerical models. For the proper conditions, the method developed in this work gives results similar to other numerical methods. These results are also in good agreement with the experimental data presented in other papers.

New Methods of Natural Gas Adjusting for Technological Purposes Based on Modern Filtration Materials

Abstract Reservoir gas treatment technologies currently in use require significant investments in equipment and materials. Considering the foregoing, new technologies are sought for treatment and separation of components of extracted gas. They will guarantee compliance with gas quality requirements arising from applicable standards while at the same time lowering the costs of investment, service and environmental protection. Therefore, the purpose of this work was to develop an efficient mobile technology for natural gas treatment, on the basis of advanced filtering and coalescing materials and membranes, which eliminate the existing, economically non-viable processes and reduce the costs related to development of new reservoirs. The purpose of designed materials was removal of solid particles, water, higher hydrocarbons and nitrogen from natural gas. Presented integrated filtration and membrane system, characterized by a highly compact design enabling installation in container stations and transporting the system between specific points of production.