Eugen Anurjew
Karlsruhe Institute of Technology
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Eugen Anurjew.
Proceedings of SPIE | 2007
Juergen J. Brandner; Edgar Hansjosten; Eugen Anurjew; Wilhelm Pfleging; Klaus Schubert
Selective Laser Melting (SLM) is a generative manufacturing procedure mainly known for the application with metal powders. From these, metallic structures are produced in a layer-by-layer way. This layer-related procedure is comparable to the stereolithographic manufacturing of polymer devices. On a base plate, a thin layer of metal powder is spread. The powder is locally completely melted by the application of a focused laser beam. The base plate is then lowered by a value defined by the thickness of the metal layer, metal powder is spread again, and the local melting process is re-initiated. The complete procedure is continued as described, until the device is manufactured in the defined way. Commercially available metal powder can be used as base material. In principle, the SLM process should be suitable for the generation of metallic microstructures. The main precondition for the generation of microstructures by SLM is that the spatial resolution of the laser focus is small and precise enough to generate microstructure walls of around 100μm thickness in a reproducible way by melting metal powder. The walls should be gas- and leak-tight. In this publication, experimental results of the generation of metallic microstructure devices by SLM will be given. The process will be described in details. Process parameters for the generation of stainless steel devices having wall thicknesses in the range of about 100μm will be given. Examples for microstructure devices made by SLM will be shown. The devices can be manufactured in a reproducible way. Moreover, very first preliminary results on the use of ceramic powder as base material will be presented.
ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels | 2008
Ulrich Schygulla; Jürgen J. Brandner; Eugen Anurjew; Edgar Hansjosten; Klaus Schubert
This publication describes the development of a new microstructure to transfer high heat fluxes. With a simple mathematical model based on heat conduction theory for the heat transfer in a micro channel at laminar flow conditions it was deduced that for the transmission of high heat fluxes only the initial part at the beginning of the micro channels is of importance, i.e. the micro channels should be short. Based on this principle a micro structure was designed with a large number of short micro channels taken in parallel. With this newly developed microstructure a prototype of a micro heat exchanger and a surface micro cooler was manufactured and tested. Using the prototype of the micro heat exchanger, manufactured of plastic, heat fluxes up to 500 W/cm2 were achieved at a pressure loss of 0.16 MPa and a mass flow of the water of 200 kg/h per passage. Due to the use of materials with a higher temperature resistance and higher stability like aluminum or ceramic, higher water throughputs and higher flow velocities could be realized in the micro channels. Thus it was possible to increase the heat flux up to approx. 800 W/cm2 at a pressure loss of approx. 0.35 MPa and a mass flow of 350 kg/h per passage. The important focus of investigation of the surface micro cooler was set on the examination of the surface temperatures for different heat fluxes and different velocities of the water in the micro channels. The experimental results of these surface micro coolers are summarized to characteristic maps. With this characteristic maps it is possible to determine whether a micro surface cooler can be used for a specific application.Copyright
ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 2 | 2011
Yongli Li; Juergen J. Brandner; Edgar Hansjosten; Eugen Anurjew; David Newport
In this paper the feasibility of obtaining optical access for micro devices made by stereolithography is investigated, to meet demands set by microfluidic research efforts. A commercially available resin SL5530 was selected for the UV polymerisation process. By optimising the design of the CAD models and the fabrication process, the suitability of the final product was improved for optical metrology. Transparent T-shaped microchannels were manufactured for future application in gas mixing study on interferometric system. Fringes patterns were first obtained from interferometric experiments and then the signals were extracted from the fringes pattern to analyse its suitability.© 2011 ASME
Applied Thermal Engineering | 2010
Eugen Anurjew; Edgar Hansjosten; Stefan Maikowske; Ulrich Schygulla; Juergen J. Brandner
Archive | 2008
Klaus Schubert; Jürgen Brandner; Ulrich Schygulla; Eugen Anurjew; Edgar Hansjosten
Archive | 2007
Eugen Anurjew; Oliver Görke; Peter Pfeifer; Klaus Schubert; Ulrich Schygulla
Archive | 2013
Eugen Anurjew; Jürgen Brandner; Edgar Hansjosten; Yongli Li; David Newport
Archive | 2013
Eugen Anurjew; Jürgen Brandner; Edgar Hansjosten; Yongli Li; David Newport
Интерэкспо Гео-Сибирь | 2008
Eugen Anurjew; Juergen J. Brandner; Edgar Hansjosten; Ulrich Schygulla; Thomas Stief; Klaus Schubert
Archive | 2006
Klaus Schubert; Jürgen Brandner; Ulrich Schygulla; Eugen Anurjew; Edgar Hansjosten