12.02.2020The recording of the successful webinar "Simulation of cavitating flows and gas bubble transport" is now available online.
Obviously we hit a nerve with our last webinar. Many developers are struggling with the cavitation that occurs in piping systems and its negative effects on the performance of hydraulic systems. Due to the ongoing discussion and the strong interest in this topic we have now put the recording of the complete webinar online. There, the viewer learns in a total of four videos how cavitation-prone hydraulic systems are simulated with DSHplus. All relevant steps from model construction to result analysis are explained: - What types of cavitation can be distinguished and how are they modeled? - How is the transport of gas bubbles modeled? - Which fluid properties must be known in order to perform cavitation calculations? - How are cavitation-endangered hydraulic systems simulated with DSHplus? The webinar covers the relevant steps from model set-up to result analysis. - What conclusions can be drawn from the simulation results?
14.11.2019DSHplus 3.11 is available in the download area.
The installation file contains the complete program. By assigning a valid license key, DSHplus 3.11 starts with your user profile. If you do not have a license key, DSHplus 3.11 starts as Personal Edition.
12.11.2019Free live webinar on 26 November 2019 at 16:00. More information on content and registration:
The occurrence of cavitation negatively affects the performance of hydraulic systems. The impairments range from increased noise levels to severe and life-limiting wear of machine parts. Cavitation in hydraulic systems can be prevented by early integration of one-dimensional fluid power simulation software into the design process. In this webinar, FLUIDON’s piping expert “RohrLEx” explains how cavitating flows can be simulated with the updated component models of DSHplus. The improved models enable the user to analyze all relevant types of cavitation – vapor cavitation, gas cavitation and pseudo-cavitation – as well as the associated phenomenon of gas bubble transport. To illustrate the workflow when simulating a cavitation-endangered and/or gas conveying system with DSHplus, two exemplary cases are presented and discussed. Webinar Outline What types of cavitation can be distinguished and how are they modeled? How is the transport of gas bubbles modeled? Which fluid properties must be known in order to perform cavitation calculations? How are cavitation-endangered hydraulic systems simulated with DSHplus? The webinar covers the relevant steps from model set-up to result analysis. What conclusions can be drawn from the simulation results? Who Should Attend? The webinar offers valuable insights into the simulation of cavitating flows for any engineer involved dealing with pipelines, hoses or piping systems, irrespective of the material, cross-section shape or size, pipe length or type of fluid. The target audience ranges from fluid power engineers to professionals from Automotive Engineering, Aerospace Engineering, Marine Engineering and Manufacturing to Biomedical Technology.
09.09.2019Users can now benefit from a new fluid property handling and many more enhancements in DSHplus 3.10
Aachen, Germany, September 10, 2019 - FLUIDON GmbH, the experienced service provider for simulation and analysis of fluid power and mechatronic systems, announced today the release of the new version 3.10 of its simulation environment DSHplus. Starting today, DSHplus users with a valid maintenance contract will automatically receive new license keys. The new version will also be available for download on the FLUIDON web page. New fluid property handling in DSHplus 3.10 With the new version FLUIDON introduces a new fluid property handling that allows users – in contrast to past versions – to include their own fluid property descriptions. In addition, the Bunsen coefficient (a measure of the gas dissolving capacity of a liquid) and the vapour pressure curve have been added as new material properties. With knowledge of the vapour pressure and the Bunsen coefficient, the pressure-dependent growth and transport of vapour and/or gas bubbles in liquid-filled pipe systems can be considered. Improved simulation of gas and steam cavitation in pressure oscillation investigations In particular, the simulation of pressure oscillation and water hammer problems benefits from the improved modelling, as – depending on the pressure level – the occurrence of gas and/or steam cavitation is to be expected. The correspondingly extended DSHplus pipe models have been validated based on published reference experiments. Also, the tried and tested models of DSHplus can now take the mechanical effects of water hammer or pressure pulsations on piping components into account by enabling the consideration of fluid-structure interaction (FSI library) during a 1D hydraulic simulation. FMI 2.0 standard to replace DSHplus-STC for simulation tool coupling In addition, the new version introduces the Functional Mockup Interface (FMI) 2.0 standard, replacing the former DSHplus-STC (Simulation-Tool-Chain) for simulation tool coupling. The Functional Mockup Interface is a tool independent standard for coupled simulations and supports model exchange as well as co-simulation.
11.07.2019FLUIDON supports the participation of the Sonnenwagen team in the Solar World Challenge
Many topics have little or no relation to one's own work. Some even compete with own projects and inspire us the more. We are pleased when other teams think courageously and seek alternative solutions. The FLUIDON team supports and donates for the Sonnenwagen project. Team Sonnenwagen from Aachen starts at the World Solar Challenge. This is the toughest solar car race in the world: From Darwin to Adelaide - 3022 km through the Australian continent only with the power of the sun. It's great.
08.05.2019Dr. Baum talks about pressure pulsations as a cause of problems in automotive piping systems
In automotive fluid power systems pressure oscillations are quite common, which are the cause of problems and complaints. It thereby does not matter whether it is a hydraulic or pneumatic system. Classic hydraulic examples are braking systems, clutch actuations and power steering as well as the entire framework of the fuel supply or the SCR system of exhaust aftertreatment. Examples of pneumatic systems are the air-conditioning channels, the gasoline vapor extraction of the fuel tank or the exhaust system. In principle, all fluid-technical systems in which components are connected via pipes and hoses. The lecture will take place on 28 May 2019 at 15:30.
06.03.2019FLUIDON presents extensive possibilities for the analysis and optimization of fluid power systems and components.
At the Hannover Messe, at Stand J33 in Hall 21, interested visitors can gain insights into the methods used and are invited to discuss fluid power issues with the FLUIDON team. RohrLEx, the piping expert of the FLUIDON team, will illustrate pressure oscillation problems in more detail and demonstrate how decisive the consideration of fluid-structure interactions is for the optimization of piping systems. Furthermore, application examples of hydraulic and pneumatic system simulation in DSHplus as well as Release 3.10 with its new material data handling will be presented.
12.11.2018Dr. Heiko Baum talks about "Pressure oscillation analysis in fuel supply systems" on November 29, 2018 in Berlin.
The conference "Injection and Fuels" under the leadership of the HDT (Haus der Technik e. V.) from 28 to 29 November 2018 in Berlin will deal with solutions for efficient, low-emission and CO2-neutral drives with internal combustion engines, Diesel, Gasoline, CNG, Alternative fuels, DEF, Water The conference will devote attention to well-to-tank and well-to-wheel fuels with their carbon dioxide footprints. The focus will also remain on current developments, such as the spray behavior of gasoline DI multihole injectors and measuring techniques for determining parameters from liquid and gaseous fuel sprays. CNG applications and fuel-blend-related soot emissions will also be presented for the passenger car segment. Discussion on diesel engines will center around developments taking place in injection technology for large engines and their liquid and gaseous fuels. The hydrogen-fueled engine will also undergo careful analysis in terms of its efficiency. The use of alternative fuels is demanding new testing methods, and the use of additives in fuels is an aspect that is growing in significance too. In SCR systems, the injection of reducing agents is being optimized on a broad scale to boost efficiency.
31.10.2018Dr. Baum talks about the "Consideration of the acoustic behavior of complex components in the simulative pressure oscillation analysis" on November 21, 2018.
In automotive fluid power systems pressure oscillations are quite common, which are the cause of problems and complaints. It thereby does not matter whether it is a hydraulic or pneumatic system. Classic hydraulic examples are braking systems, clutch actuations and power steering as well as the entire framework of the fuel supply or the SCR system of ex-haust aftertreatment. Examples of pneumatic systems are the air-conditioning channels, the gasoline vapor extraction of the fuel tank or the exhaust system. In principle, all fluid-technical systems in which components are connected via pipes and hoses. More complex components of these systems usually consist of a sequence of branched channels and volumes, whose material behavior may also change depending on the pressure or temperature. The analytical description of the acoustic behavior (impedance) of these components is difficult and can only be done very laboriously by means of physical simulation models. In this paper, an alternative approach is presented, in which the component impedance is rep-resented by a replacement model whose parameters are determined from processed meas-urement data. For this purpose, a measuring method is used, with which the impedance of any hydraulic and pneumatic components can be measured at short notice.
31.10.2018Registration and information for the free webinar on 8 November at 16:00. Speaker is Dr. Heiko Baum, Managing Director of FLUIDON GmbH.
Optimization of oil and gas pipelines by pressure pulsation analysis will protect systems regarding disturbing noise emissions, permanent component stress, reduced system functionality and a higher failure rate of the system. Pulsation is inherent in all reciprocating equipment such as compressors and pumps, screw compressors, and any other type of equipment used to move gas or liquid. To ensure functional pipeline systems, with long durability and minimized noise levels, the overall system's characteristics must be considered. The conception of a well-designed pipeline system starts with a pressure pulsation analysis. In this webinar ‘RohrLEx’, FLUIDON piping expert, explains the relationship between pressure pulsations and pipeline problems and the advantages in using differently specialized software for this process of optimization. So, he presents both an automatic analysis of pressure pulsations in piping systems with DSHplus and HyperStudy as well as the integration of a control created in Activate. Webinar Outline - Special features and requirements of oil and gas piping systems - Challenges in optimization (e.g. pulsation damping remedies, water hammer effects) - Unrivalled expertise and DSHplus for optimization of piping systems - Advantages in using DSHplus together with HyperStudy and Activate - Guided and supported instead of lost in simulation Who Should Attend? Engineers involved in the construction of piping/pipelines or using them in any way, irrespective of the material, cross-section, pipe length or type of fluid, from industries such as industrial and mobile hydraulic equipment, process engineering and oil and gas industry. As in Automotive, Aerospace, Marine, Manufacturing, Medical Technology, Fluid Power, Science and Education.
10.10.2018O. Breuer will speak about "How to Feed Simulation Models with Carriots" October 15, 13:50
At this year's Global Altair Technology Confence in Paris, Oliver Breuer, Head of Software Engineering of FLUIDON GmbH, will speak about Internet of Things (IoT) and the challenges and solutions evoke by using different software respectively DSHplus by FLUIDON together with IoT Platforms such as Carriots by Altair.
28.08.2018Oliver Breuer about Industrial Internet of Things (IIoT) - Opportunities and challenges
Today, Industrial Internet of Things (IIoT) and Industry 4.0 have become buzzwords everyone is talking about. There is an enormous pressure to follow this technical hype. While looking for a use-ful and clever way to start, enterprises are faced with a vast market of data management solu-tions. However, the promoted data volume and its colorful visualization often lack convincing ben-efits. To provide relevant results to the user, the data delivered by connected components in an IIoT-capable system have to be analyzed and placed in the right context. To increase efficiency, the precise study question must be identified first. This reduces calculation times and leads more quickly to useful information.
07.05.2018Dr. Baum, Managing Director, presented at the 11th IFK in Aachen.
Dr. Baum, Managing Director, presents measures to improve an disordered flow to the reservoir. FLUIDON presents solution models for fluid power applications at the 11th IFK in Aachen. To reduce cycle times, hydraulic drives become consciously more dynamic, what consequently leads to higher fluid exchange rates. On the part of the pressure supply no effort is too big for the design engineers. The return pipe to the tank is, however, often still calculated with rough formulas. This can lead to damages to the plant by cavitation, water hammers and diesel effects and is no longer up-to-date. On investigating water hammer events in tank-pipes it becomes obvious that an examination with simple rough calculations is not leading to the desired results. Too many factors must be considered at the calculation of water hammer. Fortunately, nowadays the numeric simulation can calculate the pressure gradient and the pressure am-plitude of a water hammer in very good approximation. Thus, by means of simulation a basic understanding of the problem in the tank pipe can be achieved. In this contribution the boundary conditions which lead to the emergence of a water hammer after cavitation are introduced. Calculation examples explain the differences of water hammers in drives with HLP fluid and with HFC fluid. By the combination of the simulation results to nomograms, a practice-fit tool is introduced, which can be used to assess the water hammer vulnerability of a drive already during the project planning. The presentation of possible constructive remedial measures completes this contribution. IFK is the world's largest scientific fluid power conference and offers users, manufacturers and scientists an international forum for the exchange of experience in the field of hydraulic and pneumatic drive and control systems. Further information can be found at www.ifk2018.com
01.05.2018E. Pasquini presented his current findings on pressure loss in unsteady annular channel flow at the 11th IFK in Aachen.
E. Pasquini presented a methodology for calculating the pressure loss in unsteady flows through concentric annular channels. The momentum equation in axial direction is solved in the Laplace domain to obtain the unsteady radial velocity distribution. Based on the velocity profile, the relation between the Laplace transforms of pressure loss and area-averaged flow velocity is derived. A time domain representation of this equation is provided for oscillating flows. For arbitrary temporal distributions of the flow, the inverse Laplace transform of the relation between pressure loss and flow velocity has to be derived. Since finding the inverse Laplace transform of the exact weighting function for each possible radius ratio is cumbersome, the annular channel flow is approximated by a plane channel. An error analysis shows that this approximation introduces errors less than 1 % for channel geometries down to radius ratios of 0.45. The approximated weighting function is transformed into the time domain by using the residue theorem from complex analysis. The resulting convolution integral can be used in one-dimensional hydraulic system simulation software. IFK is the world's largest scientific fluid power conference and offers users, manufacturers and scientists an international forum for the exchange of experience in the field of hydraulic and pneumatic drive and control systems.