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A recently installed Victory Energy boiler is supplied with fresh air through custom ductwork supplied by a third party. This custom ductwork was subject to severe space limitations. During the initial startup, vibrations occurred in the ductwork between the fan and the burner windbox. As the load reached 50%, the frequency and strength of these vibrations increased to the point where they threatened the structural integrity of the ductwork. Even though they had not supplied the ductwork, Victory Energy hired BMA to pinpoint and address this problem. Steady state CFD simulations of the...
Architects and engineers are continually pushing the limits of design through the use of novel building shapes and mixed mode ventilation systems. Analysis techniques must be sufficiently sophisticated to follow suit, especially with respect to the life safety aspects of the design. The mixed mode emergency ventilation system described in this work and proposed for a semi-enclosed bus terminal is a typical example. The terminal connects to a pedestrian mall and has a unique scalloped façade. STAR-CCM+ was used to aid in the design of the emergency ventilation system consisting of sprinklers...
LED manufacturers sort LEDs into 'bins' based on the forward voltage to give their customers the most consistent light color possible. Manufacturing tolerances can cause a range of colors even in the same batch of LEDs, so this binning process gives their customers higher consistency in the color produced. Despite the tight grouping of forward voltages in these bins, inherent LED characteristics can still result in non-homogeneous current draw, luminous flux, heat dissipation and junction temperature. This highly interconnected process was investigated using STAR-CCM+ and SPICE to simulate...
Enerconcept Technologies designs, manufactures and installs solar air heating systems. Their wall-mounted solar air heater system is modular and its configuration is customized for each building. Enerconcept had a need to quickly calculate the expected efficiency of each particular configuration and optimize design parameters like inlet/outlet position, wall thickness, etc. Lx R&D proposed to program a wizard that Enerconcept designers could use to easily run CFD analysis with STAR-CCM+ on a particular wall configuration. Relevant information like wall size and sun orientation is entered...
Various regulatory agencies such as the US EPA, OSHA, state and local code enforceme0nt agencies often require environmental impact studies when certain commercial buildings are renovated or newly constructed. Usually, these buildings are laboratories, special environments for chemical or biological agents or manufacturing plants that must discharge chemical effluents into the atmosphere. Other conditions also mandate studies of environmental influence such as large boiler exhaust, emergency power generation, or the effects of diesel trucks idling at critical areas around buildings. The CAES...
The landscape of optimization methods for fluid flow problems is continuously broadening. Beside traditional approaches like parametric optimization, new methods like nonparametric (topology) optimization schemes are increasingly discussed. Optimality Criteria (OC) based topology optimization combines the benefits of an easy, straight-forward setup with a reasonable calculation effort for large solution spaces. Using this method often results in new, sometimes unconventional design ideas (innovation!). This presentation starts with a brief introduction into the OC-based topology optimization...
CAE-suites allow the automatic generation of geometry variants and the development of sophisticated strategies to help find an optimal design. The geometry representation of complex free-form surfaces is one important aspect when it comes to automated CFD-based optimizations of flow-exposed products. Typical examples for functional free-form surfaces are compressors and turbine blades, wings, ship hulls, nozzles, ducts, diffusers and many more. On the one hand, engineers want to investigate only feasible shapes of their automatically varied geometries that fulfill a set of constraints...
Exploring the design space of a simulation requires the preparation of multiple STAR-CCM+ simulation files. Setting various run dependent conditions such as inlet velocity and rotating body angular velocity can be done using STAR-CCM+'s batch mode and an internally defined java macro file. When the run dependent conditions need to altered to conform to a statistically defined design of experiments or as part of a multi objective optimization the amount of simulation preprocessing that needs to occur becomes unmanageable for the CFD analyst. This presentation investigates the process of using...
Although these days it is considered a 'toy', a boomerang is a sophisticated device which poses a challenging design problem as it is subjected to six degrees of freedom and unsteady aerodynamic effects which, due to the rotation, vary from section to section along its length during flight. In addition, variations in the launch (due to the launching person’s strength, technique etc.) add significantly to the complexity of the design problem. This presentation shows how the process integration and design optimization software modeFRONTIER was coupled to STAR-CCM+ to optimize the shape of a...
Optimate and Optimate+ are add-on modules for STAR-CCM+ that directly employ state-of-the-art process automation and design optimization technology from Red Cedar Technology. The Optimate solution, which includes CD-adapco’s Power Token software licensing, eliminates the barriers that have historically prevented CFD-based design optimization with any real practicality. This talk will include a demonstration showing how this process couples to existing STAR-CCM+ simulations for both design iteration (Optimate) and optimization (Optimate+) analyses.

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