CFD Heat Transfer Analysis: CHT, one-way FSI and two way thermo-mechanical FSI
The management of thermal loads and heat transfer is a critical factor in the design of many mechanical products and systems. Enteknograte’s Engineering Team provides a comprehensive Steady-State and Transient CFD Thermal Analysis & Design services using Siemens Star-ccm+, OpenFoam and Ansys Fluent Flow Simulation. CFD Thermal Analysis extends the capability of FEA thermal analysis by replacing the simplistic convection boundary conditions with direct calculations of the heat transfer coefficients based on the fluid flow properties and is often referred to a conjugate heat transfer analysis.
Once the flow solution is complete and the temperature distribution in the solid bodies has been computed then the effects of thermal expansion, thermal stress, fatigue, creep and thermally induced buckling can be calculated in detail. Effects such as temperature dependent material and fluid properties, contact conditions and other sources of non-linearity can be modeled in detail, regardless of the complexity of the system.
Equipped with multi-domain knowledge and deep technical expertise, Enteknograte engineering team offers global strategic engineering and environmental consultancy that specializes in performing 1D-Multi-Physics CAE simulations, 3D FEA and CFD thermal analyses with Siemens Star-ccm+, Ansys Fluent, Abaqus and Matlab Simulink and design optimization to a wide variety of clients and industries, such as: Aerospace, Electronic Systems, Oil & Gas and Heavy Industries.
Fluid Structure Interaction for Thermal Analysis
Fluid Structure Interaction (FSI) calculations allow the mutual interaction between a flowing fluid and adjacent bodies to be calculated. This is necessary since all real structures are flexible, especially those that are large or subject to high fluid loads. The body forces generated by fluids flowing are highly sensitive to the shape and curvature of adjacent surfaces.
By coupling a CFD solver and the FEA solver, the deformation of a body resulting from the fluid loads and the subsequent modification of the flow field due to the newly deformed geometry can be computed iteratively.
This technique allows aeroelastic instabilities such as flutter, to be detected and avoided early in the design cycle. Similarly, where structures are subjected to cyclic fatigue loading, such as rotor-stator interaction in compressor applications or vortex shedding around civil structures, these load effects can be accurately quantified to allow the fatigue life of the structure to be assessed.
Simulating the thermal performance of a product early in the design phase can save large amounts of time and money by getting the design of the early prototypes right from a thermal management standpoint, thus reducing the need for additional prototypes that might otherwise be required to diagnose and correct thermal issues. Simple computational fluid dynamics (CFD) software can be used to analyze thermal issues such as determining how heat is transferred through a fluid. But many problems are more complex, such as those that involve multiple mechanisms of heat transfer, where heat is transferred through both solids and structures.
Cases in which the fluids and structures involved in heat flow are closely coupled, so that thermal deflection of the structures affects the fluid flow, are also challenging. Engineers often need to understand how heat is transferred by a number of different mechanisms through a complicated interconnected system in order to understand how their product or process will perform under a given set of conditions. This point is one of the applications of FSI simulation with Coupled CFD-FEA method.
As in isolated FEA and CFD one of the most profound benefits of FSI analysis is the ability to conduct comprehensive, multi-point optimisation of designs. This process allows us to optimise a design to a given set of performance parameters and can be used to tune frequencies, or maximise fatigue life or avoid harmful resonance.