Featured CFD Services Case Studies
CFD Design of Dirt Protection System for Power Generation Gas Turbine
For this Client CFD Consulting
Project, the CFD Analysis
Simulations to design dirt protection system for next-generation power generation gas turbines
Perform CFD Modeling
simulations to evaluate multiple dirt shield concepts to protect turbine cooling holes from clogging
Eulerian-Lagrangian approach for modeling dirt particle trajectories was adopted as part of the CFD Consulting Services
provided by BroadTech Engineering. Perform CFD Services
, such as Fluid Flow simulations to understand the sensitivities of results due to variations in dirt particle properties, distribution, etc.
Outcome & Conclusion:
CFD Simulations performed as part of the CFD Consultancy
work helped in selecting the final design of the dirt protection system.
CFD Simulation for Pulsejet Combustor analysis
Aim of the CFD Thermal analysis
of the Pulsejet combustor is to simulate a baseline pulsejet combustor and then optimize the Engineering design for more thrust.
Geometry: Extracted internal volume, Mesh
Regions: Set appropriate mass flow inlet for fuel, and pressure outlet for air.
Physics: implicit unsteady, Eddy breakup hybrid model, segregated flow.
Post: thrust report, temperature, velocity and Combustion chamber peak pressure report.
A CFD software
named Optimate was used to perform design changes for a specified number of parameters. This is used as part of our CFD Analysis Services
to qualify whether the modified design has met the required criteria or not. Based on this data, the number of CFD Simulation cases will be decided by the engineers in the CFD Company
Our CFD Consultant
Performed more than 20 design sets to improve the thrust produced by the engine for the same fuel consumption.
CFD Study of Aerodynamics of Wind Turbine Rotor.
A sample data is taken for demonstrating the capability of this Numerical modeling method.
The complete methodology for the design of the wind turbine is demonstrated by calculating the design parameters used for the Computational Fluid Flow Analysis
of the wind turbine. The designed blade is also analyzed using the blade element momentum theory. Computer codes are written to verify whether the blade satisfies the design condition.
Numerical Methods for Partial Differential Equations and High-Performance Computing
As part of the scope of work for a Wind Engineering
Project, the Linear advection equation is studied to analyze Upwind and perform CFD Turbulence Modeling
, through the use of Forward Time Central Steps (FTCS), Lax-Friedrichs, Lax-Wendroff, and MacCormack explicit methods.
All numerical schemes are treated in terms of accuracy, consistency, and stability and numerical effects as truncation error or solution dissipation and dispersion are brought to examination. The highest accuracy is obtained with Lax-Wendroff and MacCormack, which lead to the same results for linear problems, while FTCS methods commonly used in Wind Flow Analysis
are unconditionally unstable.
are performed in the Fortran language, where different parametric studies are carried out. Different CFL conditions, grid refinement levels, final times and scalar fields are studied quantitatively and qualitatively using graphs and tables. Convergence to solution as CFL condition is approached, the number of nodes is increased and the final time is decreased is proved.
Another key aim of present Wind Analysis
studies is to implement a parallel code for a given problem and measure its performance compared to serial code. Both results and code structures and strategies are clarified through descriptive flow charts, which was later applied to various applications, such as Building Aerodynamics and Wind Simulation
, Building CFD Thermal Analysis
, Complex Multiphysics Simulation
Analysis, Advanced Fluid Turbulent Modeling
Simulation, Numerical Modeling of Centrifugal Pump Simulation
. Finally, improvement in terms of computational time is achieved through parallel code, but larger computational cost is desired to be more efficient and worth it.
Numerical Methods for Compressible Flows
A deep study about compressible flow computational resolution is carried out as part of the work for a Computational Aeroacoustic
Project. Principal characteristics and features presented in the mentioned flows are described in the Multiphysics Modeling
Simulation study, including a review of most usual shock waves and discontinuities observed in nature.
Beyond the physics, remarkable ingredients of the Godunov method for solving hyperbolic equations are studied and its limitations are highlighted. Different Riemann solvers, limiter functions and order of accuracy are implemented in 1D and 2D in-house codes with both MUSCL and WENO approaches.
To verify the given solver and analyze how different flow features are represented in the Multiphase Flow Simulation
, some well-known problems, such as Ventilation CFD
applications and Aerodynamic Simulation
Studies are solved and compared to results found in the literature. Shock tube problem is implemented for the 1D solver, while radial explosion, frontal facing step, and double Mach reflection cases are studied for the 2D solver. Robust results have been provided for all methods tested, finding the most accurate results for HLLC solver and no significant difference between slope limiters.
Some problems have been faced when trying to capture weak flow features, being needed finer grids and higher-order methods that were not inside the scope of the present study.
CFD Turbulence modeling Services.
Reynolds Averaged Navier-Stokes (RANS) and Detached Eddy Simulation (DES) are performed
in a wall-mounted cube in a wind-tunnel domain at Reynolds number 40,000.
Aims are to set up both computational Fluid Flow Simulation
studies successfully with an appropriate mesh grid refinement, turbulence model, numerical scheme and spatial discretization, which is similar to that used in FSI Simulation
The computational cost of the Flow Simulation
is limited by 1e6 cells in the 3D domain. Models’ reliability is tested through velocity profiles, contours, iso-surfaces and streamlines representations compared to experimental results.
Finally, accurate Computational Fluid Dynamics Analysis
results are obtained by DES, while RANS simulation is unable to capture transient fluctuations related to turbulence structures. The given problem presents several
vortex structures well defined that are only well captured by DES. However, good results in terms of general flow patterns and velocity magnitudes are obtained with Quadratic Upstream Interpolation for Convective Kinematics (QUICK) algorithm discretization and non-equilibrium wall function for the near-wall treatment.
Thermal soak CFD Simulation using co-simulation
Establish CFD Thermal Simulation
methodology to predict the transient thermal behavior of the underhood component of a passenger car at engine-off condition, after it has run for a certain time.
Outcome & Conclusion:
CFD Simulation of Diesel Filling Process
A full assessment of the diesel filler using different diesel filling nozzles was conducted. Diesel fillability analysis using various dispense flow rates was also performed.
The CFD analysis
performed by most Fluid Dynamics Company
Largely consists of an implicit unsteady CFD simulation
with a multiphase volume of fluid (VOF) flow model. For diesel fill, there is also a particular focus on foaming; a user-defined foam phase is incorporated in the model to predict the generation and dissipation of diesel foam.
During the CFD analysis
, the volume fractions of diesel and foam are tracked at the sensor port of the nozzle. The target is to keep the volume fraction of diesel or foam at the sensor port below 5% during fill to ensure premature nozzle shutoff.
A detailed Computational Fluid Dynamics Simulation
investigation study showed that modeling the tank geometry has little effect on the outcome of fill quality. Therefore only the filler geometry is modeled to avoid computational overhead. A filler head equipped with a misfuel device (MFD) is taken into account to ensure fill quality for the analysis.
CAE Tools Used:
StarCCM+ – Pre-processing/ Simulation/ Post Processing
In this study, various diesel filler designs and filler nozzles were analyzed. Considering all the cases, the design which meets a shutoff target is considered as the best design for the proper diesel fill.
The diesel fill study was done to assess the dependence of the diesel filler design parameters on the fuelling system. Computational Fluid Dynamic analysis
was performed to understand the volume fraction of diesel or foam at the sensor port below 5% during fill to ensure no nuisance or premature nozzle shutoff.
CFD Analysis of Snow Avalanche
Duration: 6 Months (March 2011 to Aug 2011)
Client: DRDO (SASE)
The aim of the project is to Defining the properties (Viscosity and internal friction and the shear stress) of the snow by UDF and find out run-out distance and velocity of the snow coming down from the snow chute to verify with physical test results.
Design of Tank internals like inlet distributor and outlet oil collector by CFD Analysis
Duration: 3 Months, Jan 2011 to March 2011
Team Size:3, Responsibility: CFD Engineer
The CFD Consulting project aims to design of inlet distributor and outlet oil collector by CFD analysis of gravity separation of oil and water in oil Tank.