Št. zadetkov: 11
Video in druga učna gradiva
Oznake:
Leto:
2007
Vir:
videolectures.net
Izvirni znanstveni članek
Oznake:
gas dynamic virtual nozzle;micro-jet;compressible multiphase flow;finite volume method;volume of fluid;
In this paper we present a numerical study investigating the effects of nozzle geometry on stability, shape and flow characteristics of micron-sized liquid jets, produced by injection molded gas dynamic virtual nozzles (GDVNs) operating in vacuum. The jet characteristics are described as a function ...
Leto:
2018
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
serijska femtosekundna kristalografija;mikro-curek;brizganje;kapljanje stisljiv dvofazni tok;metoda končnih volumnov;metoda volumna tekočine;zasnova odprtine šobe;serial femtosecond crystallography;micro-jet;jetting;dripping;compressible two-phase flow;finite volume method;volume of fluid method;nozzle orifice design;
Liquid micro-jets are crucial for sample delivery of protein crystals and other macromolecular samples in serial femtosecond crystallography. When combined with MHz repetition rate sources, such as the European X-ray free-electron laser (EuXFEL) facility, it is important that the diffraction pattern ...
Leto:
2021
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
micro-jets;double flowfocusing nozzle;water and ethanol mixture;water and 2-propanol mixture;
The purpose of this work is to determine, based on the computational model, whether a mixture of a binary liquid is capable of producing longer, thinner and faster gas-focused micro-jets, compared to the mono-constituent liquids of its components. Mixtures of water with two different alcohols, water ...
Leto:
2021
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
liquid micro-sheets;two-phase nozzle flow;computational model;sensitivity study;liquid properties;operating conditions;
The purpose of this work is to numerically evaluate the behaviour of microscopic gas-focused liquid sheets in terms of material properties, nozzle structure and operating conditions used for experiments in spectroscopy and scattering where a short optical path is required. The numerical simulations ...
Leto:
2021
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
serial crystallography;micro jets;multiphase flow;fluid rheology;non-Newtonian fluid;flow focusing;
The present numerical study assesses the jet length, diameter and velocity of various non-Newtonian power-law fluids of a gas dynamic virtual nozzle. A related two-phase flow problem is formulated within the mixture framework and solved with the finite volume method and volume of fluid interface tre ...
Leto:
2024
Vir:
Inštitut za kovinske materiale in tehnologije (IMT)
Objavljeni znanstveni prispevek na konferenci
Oznake:
serijska femtosekundna kristalografija;mikro-curek;reologija toka;nenewtonska tekočina;fokusiranja toka;serial crystallography;flow-focusing;micro jets;fluid rheology;non-Newtonian fluid;flow focusing;
Stable liquid jets are crucial for successful serial crystallography experiments. They are produced from gas dynamic virtual nozzles (GDVNs), where the liquid from an inner capillary is focused by a co-flowing gas from an outer converging capillary. Our previously investigated non-Newtonian jets wit ...
Leto:
2024
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
rentgenski laserji;rentgenska optika;večplastne leče Laue;prenos toplote;numerične simulacije;X-ray free-electron lasers;X-ray optics;multilayer Laue lens;heat transfer;numerical simulation;
Multilayer Laue lenses (MLLs) made from WC and SiC were previously used to focus megahertz X-ray pulse trains of the European XFEL free-electron laser, but suffered damage with trains of 30 pulses or longer at an incident fluence of about 0.13 J/cm[sup]2 per pulse. Here, we present numerical simulat ...
Leto:
2022
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci
Oznake:
numerične simulacije;prenos toplote;rentgenski laserji s prostimi elektroni;večplastna leča Laue;numerical simulations;heat transfer;x-ray free-electron lasers;multilayer Laue lens;
We present numerical simulations of the heat loads on novel diffractive X-ray optics, known as multilayer Laue lenses, exposed to high-intensity X-ray beams produced by an X-ray free electron laser (XFEL). These lenses can be used to focus XFEL beams to nanometer spots. The temperature distribution ...
Leto:
2024
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci
Oznake:
fokusiranje toka;elektrospreji;brizganje;plinsko dinamična virtualna šoba;električno polje;flow focusing;electrosprays;jetting;gas dynamic virtual nozzle;electric field;
This paper investigates the acceleration of flow-focused micro-jets under an applied external electric field. Such thin and fast jets are needed, for example, to deliver protein crystals in X-ray free electron laser experiments. This contribution focuses on analysing the acceleration of liquid jets ...
Leto:
2024
Vir:
Fakulteta za strojništvo (UL FS)