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The paper focuses on the simulation of medium dynamics in the environmental scanning electron microscope. In particular, the paper examines the conical aperture location effect in the differentially pumped chamber and the width of the pumping channel in this chamber. The solution is based on the Taylor-Maccoll theory about the impact of the shock wave and was obtained by the use of continuum and finite volume methods in the ANSYS Fluent system.

The article deals with the analysis of gas flows in pumped canals in differential pumped chamber of the Environmental Scanning Electron Microscope (ESEM). The article compares and verifies existing results of differentially pumped chamber flow simulation from ANSYS Fluent system, which uses the mechanics of continuum, with the ones published by D. Danilatos using the Monte Carlo method.

Thermophotovoltaic (TPV) belongs to the third generation of photovoltaics. It is a direct energy conversion process from heat to electricity via photons. This technique works on the principle of an effect of use as much of the radiation spectrum for optimal system operation. These systems have great potential application in commerce, military and aerospace industry. This article deals with thermal simulation, which includes the radiation effect model, of the thermophotovoltaic emitter and its influence on the simple photovoltaic system.

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