Software FLUENT

The example is the fuel cell module of commercial CFD software FLUENT . As was already mentioned, it is a set of additional subroutines (on top of Navier-Stokes equations and other transport models in CFD) to account for electrochemistry inside... 

P 24] Computer simulations were carried out using the software Fluent 6 [68], A 3-D solid model of the T-channel micro mixer was built and named in Gambit The simulations were made solely for the zone of the T-junction, since for all other zones, including the downstream section of the mixing channel, laminar flow was assumed. Thus, a fine mesh of 173 000 brick elements could be used for the solid model. 

P 28] A 3-D solid model of the cross-shaped micro mixer is meshed to a sufficiently fine scale with brick elements of 2 pm for the simulations [71]. Simulation results were intended at very short time scales, e.g. in intervals of 50 ps, to verify the mixing patterns at the initial state after application of pressure. The numerical values of the mass fraction are taken to give quantitative measures of the mixing efficiency. The pre-processor fluidics solver and post-processor of ConventorWare were used for the simulations. The software FLUENT 5 was used for verification of these results, since the former software is so far not a widely established tool for fluid dynamic simulation. 

One example that illustrates many of the concepts described in this entry is the conversion of ozone to oxygen in a fluidized bed. The particles in the bed serve as a catalyst where surface reactions take place. To model this complex process, the commercial software FLUENT is used. The fluidized bed is simulated using the Eulerian granular multiphase model, and a reaction is specified in the bed to account for the decomposition of ozone and subsequent production of oxygen. 

Polyflow (application software) Fluent Inc. Lebanon, NH http //www.fluent.com/software/ polyflow (accessed Mar 2005). 

Domain decomposition with sliding meshes. This strategy is very popular in the finite volume literature and implemented in finite volume-based software (Fluent , CFX , and Star-CD ). The idea is to decompose the flow domain into several concentric cylindrical meshes and allow slipping of the meshes between the partitions. The continuity of the solution at the mesh interface is imposed by... 

Simulation of flows in vessels with commercially available simulation software FLUENT [206] enables insights to be obtained into the three-dimensional behavior in mixing processes in any geometry. The inclusion of chemical reactions or of a solid or gaseous phase is also possible. The "method of slipping networks is based upon the flow behavior periodically changing at a repeating rate n x z in the case... 

In this section a series of simulations of a standard vessel equipped with a Ruhton turbine, as obtained by use of the Multiple Rotating Reference FYame (MRRF) method, are evaluated. The simulations are performed with the commercial software FLUENT [24]. The simulations were run with a resolution of 86950 cells. The turbulent effects are described by a modified (RNG) k-e modeH [97, 98, 99, 82, 66]. For model validation experimental LDA data characterizing a standard vessel of laboratory scale, as reported by Engeskaug [22], is used. The simulations considered in this section have been reported by Engeskaug [22], Druecker [17] and Jakobsen [43]. 

The most popular simplified version of n-fluid model is the mixture model. In the mixture model, different phases share the same temperature and pressure profiles. However, the velocity field is different for each phase. In this model, conservation equations are solved for the mixture, and the velocity difference between phases is handled through the concept of slip velocity, which is the difference between the velocities of two phases. In the commercially available software FLUENT, this slip velocity is found through the algebraic formulation proposed by Manninen et al. (1996). The basic assumption of the algebraic slip mixture model is that a local equilibrium between the phases should be reached over short spatial length scale ... 

The borderline between two layers Different authors give different values based on their study. For instance, Versteeg [7] recommend the borderline at y+ = 11.63, below such value is the laminas sub-layer and above that is the turbulent layer while the software FLUENT [8] designate the border at y+ = 11.225. 

The model equations were solved numerically by using the commercial software FLUENT 6.2 with finite volume method. The SIMPLEC algorithm was used to solve the pressure-velocity coupling problem in the momentum equations. The second-order upwind spatial discretization scheme was employed for all differential equations. 

In this section a series of simulations of a standard vessel equipped with a Ruh-ton turbine, as obtained by use of the Multiple Rotating Reference Frame (MRRF) method, are evaluated. The simulations are performed with the commercial software FLUENT [24]. The simulations were run with a resolution of 86950 cells. 

Effects of different lamp arrangements on photocatalytic reactor performance have not been well studied. Recently, Xu et al. used computational fluid dynamics (CFD) simulation software FLUENT to simulate microorganism particle motion in various UV water disinfection reactors. The influence of lamp arrangements on the UV-FR field and log reduction of different UV water disinfection photoreactors were studied under various flow rates and constant UV dosage. In the experiment, direction, number, and orientation of lamps were diverged. The results showed that... 

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