CFD & FEA Consulting

The project was commissioned by LDK Consultants and the scope of the CFD study was to predict if the temperature field inside the mall public spaces is appropriately low during summer and sufficiently high during winter, to guarantee the thermal comfort of the visitors and employees. The “Mean Age of Air “was also estimated for every point of the mall, in order to highlight dead zones with stagnant air. Such regions, indicate poor air quality conditions and may be also related to unpleasant cooking odours in the food court... >>

Locations with steep changes in the terrain elevation, as is typically the Greek country, are difficult cases for the “traditional” calculation tools for the estimation of the wind potential energy. Simulations without CFD (Computational Fluid Dynamics) technology may be of poor accuracy and therefore cause negative effects on the economic exploitation of the wind park and reduced efficiency. SimTec performed CFD simulations for the wind flow over a geographical site in Greece, in order to assess its wind energy potential before the installation of a wind farm. The terrain... >>

KRONOSPAN is the global leader in the production of particleboards, MDF (Medium Density Fibreboard), laminate flooring and UF/MUF/MF resins for wood-based panels. It is one of the fastest growing enterprises in woodworking industry worldwide and located in 22 European countries, USA and China. The group’s revenue reaches 4 billion $ (2015). In several production stages of the company, a batch reactor is utilized in order to mix liquids and solids that are used at the manufacturing process. KRONOSPAN decided to design a larger reactor, which will come from the... >>

SimTec conducted a Computational Fluid Dynamics (CFD) study for the air-flow inside an Air-Curtain. The Air–Curtain resembles an air–condition unit and is placed over openings (e.g. of commercial stores, shops, hotel & restaurant entrances) and aims at creating an air jet of sufficient kinetic energy that will not allow the cross flow through the opening, hence thermally separating the two areas. The commercial CFD software FLUENT was used for this study. The CFD model construction included: File import from a CAD software of the 3D Air-Curtain geometry to FLUENT’s... >>

This CFD study was performed on behalf of company “ELPEN S.A.”, one of the larger and more research active pharmaceutical companies in Greece. The ELPENHALER device is used for drug delivery in dry powder form for the prevention and therapy of Asthma and Chronic Obstructive Pulmonary Disease and is available in two designs: (a) Single blister and (b) Double blister (Figure 1). ELPENHALER has been developed exclusively by ELPEN, aiming at design simplicity and minimization of patient interference, in order to eliminate operation errors. The drug-delivery principle is based... >>

The National Museum of Modern Art (NMMA) in Athens will be housed in the renovated former FIX brewery industrial building in Syngrou Av. As fire regulations for public buildings are very strict regarding human safety and furthermore some of the exhibits in the NMMA permanent collections are extremely flammable, the designed dedicated smoke exhaust system needed a solid validation prior to construction. “INSTA Consultants Engineers” the designers of both normal and emergency HVAC systems, in cooperation with the supervisory body, assigned SimTec to perform a number of CFD experiments... >>

SimTec constructed a Computational Fluid Dynamics (CFD) model for the simulation of the temperature distribution inside a power generation hall in the Libyan desert operating with three diesel engines. The model was requested by ”LDK Consulting Engineers and Planners” (LDK). The aim of the simulation was the verification of the ventilation/cooling system designed by LDK, in the form of specific maximum temperature requirements on the diesel engines’ surfaces. Available 2D CAD files (side and plan views) were used for the reconstruction of the 3D geometric model of the engine... >>

SimTec conducted a Computational Fluid Dynamics (CFD) project for the oil flow inside a control valve. Via the regulation of the screw on the top part of the valve (pilot) and due to the action of mechanical springs, the valve opens automatically when the pressure exceeds the pre-defined upper limit and oil flows through the valve relieving the hydraulic system. The valve opening, as well as the oil flow, depends on the value of the pressure. When the opening is small enough, then significant pressure drop takes place locally... >>

  SimTec conducted a Computational Fluid Dynamics (CFD) project for the heavy oil flow inside a submarine pipe, during the fuel feeding of a power generation station on a Greek island from a tanker ship. The pipe consists of a flexible rubber part, which is attached on the tanker and a permanent steel part with a cement coating of 1 [cm]. Both parts have neither insulation nor heating system. The flexible pipe is assumed to have a perpendicular position, whereas the steel pipe of 650 [m] length lies on... >>

Slovenia-based company Melamin d.d. Kočevje, is active in many industry sectors such as the production of paper, paints & lacquers, rubber, fire retardants, as well as in wood processing and civil engineering. In all these sectors, Melamin employs its own technology knowledge and product development procedures and one of the major unit production processes in all the above areas is batch mixing; adding the various (usually liguid, sometimes solid) substances in a vessel/reactor of (usually) cylindrical shape and mixing them by the action or one or more rotating impellers.... >>

A CFD model was constructed for the simulation of the steam turbine hall of Vasilikos Power Station in Cyprus, in order to present and prove the adequacy of the ventilation system design. The project was performed for J&P – AVAX S.A. The 3D geometry was extracted directly from available 3D CAD files, after the un-necessary details were deleted. A tet-dominated mesh of 3.6M cells was created, due to the complexity of the geometry. Inflation layers were positioned around the major energy-dissipating equipment (steam turbines and generators). The air flow... >>

SimTec in cooperation with EL.K.E.ME. (www.elkeme.gr), the research center of VIOHALCO Group of companies, constructed a mathematical model for the simulation of batch annealing furnaces for aluminum strip in coiled form installed at the EL.V.AL. production company. The coils are formed by winding aluminum strips, of various thicknesses and widths after a cold rolling process. Annealing may last up to 24 [h], depending on the coil size and strip thickness. These furnaces have dimensions 7.0×5.5×4.5 [m] and the thermal energy consumed is approximately 1.2 [MW]. Annealing is crucial for... >>

EL.V.AL. S.A. is the major aluminum production and processing company of the VIOHALCO Group, the largest metals group in Greece. The new industrial roller to be installed at EL.V.AL. was designed by TEKA Systems S.A. a company offering engineering services for the industry. A roller in an aluminum processing company is a very important piece of machinery that needs to operate safely and efficiently. This can be achieved only if the large assembly of the roller parts works elastically, otherwise the large piston forces of 150 to 200 tn... >>