# Heat Transfer Analysis Using Ansys Assignment Sample

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Words: 1921

## Heat Transfer Analysis Using Ansys Assignment

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### Introduction - Heat Transfer Analysis Using Ansys

In this study paper, a CFD corresponding to the heat sink has been designed for analysing this process. Along with that, the heat sink of a supercomputer. Besides, Ansys has been used for the design. Furthermore, geometry, meshing and set up have been processed. The heat sink has been designed and in hexahedral mesh has been performed for visualization. In such accordance, several kinds of processes have been performed for the CFD analysis.

Part 1

#### Problem statement

The cooling process of the electronic system corresponding to the super computer has turned into the main issue in conducting and planning material employed in several kinds of electronic and electrical systems including the aerospace and others. Integrated circuits (ICs) refers to a significant number of resistance, transistors and these ICs create a lot of heat where the effectiveness of the component is reduced.

#### Description

Integrated circuits (ICs) requires active cooling for the constant running of the electronic component (Singh, Kumar and Kumarand Mikielewicz, 2021). On the other hand, with the science of manufacturing procedures, the sizes of different types of computer ICs are reduced in a significant manner. Along with that, the heat flux on the chips is rising at a significant rate. In such circumstances, the sizes of multiple types of electronic devices are diminished to satisfy the demands of the business. In such circumstances, the free space blended with the cooling system is too limited, and the conventional cooling techniques are unable to provide the developing requirements. Furthermore, there are mainly three major procedures in order to develop the efficiency of consuming the heat from various components of computers implementing the air cooling systems. Changing the geometry of several conducting materials is done to enhance the convection surface area, replacing the conducting material to increase the temperature of the surface and producing a higher convection coefficient. In addition to that, it increases the flow rate of the external fluid for decreasing various layers corresponding to the thermal and hydraulic boundary.

#### Analysis and Optimisation

Multiple kinds of researchers have operated on conjugate heat transfer at different types of protocols blended with electronics and super computer through CFD. In such circumstances, a complete desktop computer system has been simulated, where CPU is used (Bangalee et al. 2021). Along with that, due to the joining of other equipment like memory, chipset, AGP, PCI cards, floppy drives a huge heat is dispersed into the system. On the other hand, it has determined the entire field with commercially available software, Ice Pack. Besides, it has been seen that the CPU heat sink like a volume resistance, becoming the similar impedance as the exact geometry for reducing the complexity regarding this model. On the other hand, it has developed the cooling of PCI cards along with PCI side vents and multiple baffles. Furthermore, Icepak has also been utilized for studying the airflow in a compressed electronic form.

#### Discussion of Performance

The pressure loss has been investigated for the appearance of the inlet and the outlet grilles. In such accordance, the outcomes regarding an exact CFD modeling corresponding to a heat sink has been analysed along with multiple kinds of examined data (MOHAMMED and RAZUQI, 2021). Besides, the coarse model has been founded, which corresponds well with the detailed model without missing various heat sink characteristics. Moreover, heat sink performance is too effective with Fluent. In such circumstances, the thermal performance of staggered fin configuration has been found, which is too important over planar fin configuration corresponding to the super computer system. Along with that, pin fins are combined with plane fins in order to achieve a design corresponding to heat sink called plate-pin fin heat sink. Ansys has been used for the design of the heat sink for a super computer. Hence, this design is too significant for illustrating heat transfer.

Part 2

1. Reynolds number

Re= (2.866*v*150)/ (8.386/10^-6) =2800

The Reynold number refers to a pure number through which the flow of liquid is determined.

According to Reynold, the critical velocity of a liquid is taken as v?, where the diameter D is given by

V = Reμ/ρD

Or Re = VDρ/μ

Along with that, the coefficient of viscosity of the liquid is μ, which is flowed and density of the liquid.

Re is the Reynold number and the critical velocity is V.

Flow Velocity

Flow rate is directly proportional to the reynold number , where Re = VDρ/μ, through this formula flow velocity has been calculated. Q=A¯v , where v is the velocity and A is the cross sectional area.

1. Tc

Operating temperature of heat sink Tc = 50 degree C

1. Heat sink for Lower cost

Heat sink is V= (Q*Rv)/ΔT = 10* Q/60 Where the heatsource power is Q and Rv is volumetric thermal resistance and ΔT is temperature difference.

1. Mean outlet temperature

ΔTm  is the outlet temperature and T1, T2 are different temperatures and (T1-T2) is the change of the temperature.

ΔTm = (T1 – t2) – (T2 – t1) = (60-25)-(25-60) =35+35=70 Degree C

1. Pressure Drop

Rθjc = 2.5 °C/W

P is the pressure drop which has been expressed as “FD/AD”.

1. Required power

Required power is Q= V*ΔT/Rv

Fin number nf = qf/qmax

qf=NAfnf(Tb-Tinfinity)

In this design Fin number is 17 Figure 1: Geometry of Heat Sink

(Source: created by Author)

1. The area of study regarding heat sink is named Computational Fluid Dynamics or CFD. Along with that, the Navier-Stokes equation refers to a time-dependent continuity equation for the maintenance of mass, where 3 time-dependent conservation of momentum equations and a time-dependent conservation of energy equation are utilized. Along with that, structural hexahedral mesh has been implemented in the ansys design of the Heat sink in order to conduct several calculations and the visulizations.
1. CFD is mainly a numerical process in order to solve multiple kinds of complex equations.

Navier-Stokes equations are the absolute equations corresponding to the Computational Fluid Dynamics. Besides, it is dependent on the conservation law of physical properties of fluid. Furthermore, the principle of conservation law is that an object's variety of properties, such as mass, energy, and momentum, is selected by different types of input and output. Errors can happen corresponding to various simple flow models or simplified boundary conditions. Also, possible doubts are caused by few computing values per cell, appearing in interpolation errors. On the other hand, computation time can increase for various large models. In such accordance, the CFD design has to maintain accuracy. Besides 3D CFD model have been designed corresponding to this Heat Sink, where several kinds of conditions have been applied for the development of the Ansys design.

1. Volume, elements, boundary and other parameters are too significant for analysing multiple kinds of fluid dynamics and heat transfer (Bangalee et al. 2021). In such correspondence, mainly Navier-Stokes equations are utilized for solving multiple kinds of problems regarding heat transfer. The meshing of the flow corresponding to the “heat sink” has been figured out through the ansys design. Figure 2: Meshing of Heat sink

(Source: Created by Author)

1. CFD flow analysis (Computational fluid dynamics Flow analysis) is mainly an engineering simulation technique, which is utilised broadly by Engineering from the start in order to resolve a wide category of Fluid flow engineering difficulties which comprise liquid flow, thermal heat transfer, and chemical reaction. Through the ansys design fin spacing and the power drop has been explored. Figure 3: Control Static pressure

(Source : created by author)

In the above figure, the control static pressure has been seen through the Ansys design, where the heat sink has been visualized. on the other hand, the racked number has been seen in the console. Besides, the axis has been shown thoroughly for the visualization of the heat sink.

1. In CFD physical models have a great importance for seeing and moving different kinds of parts of the design. Along with that, multiple kinds of layers are included in this design protocol for understanding the structure. Various results corresponding to this design are almost same as the analytical values which are too effective for the Heat sink. Figure 4: Graphical Outcome

(Source: Created by author)

1. In this study paper, through the Meshing and setup the graphical outcome has been explored through the graph, iterations and residuals have been seen. On the other hand, various settings have been set up where the time scale factor has a great importance, for the exploration of the graph. Besides, velocity, temperature, pressure and the heat flux have been explored trough the graph.

Summary

Ansys design has been figured out through this chapter, where an ansys design of heat sink has been performed. In such accordance, several processes have been conducted. Several calculations have been processed for this heat sink design. Besides, various awareness and principles have been analysed through this chapter. Therefore, this study research is too effective for solving the problem.

References

Bangalee, M.Z.I., Rahman, M.M., Zaimi, K. and Ferdows, M., 2021. Numerical Optimization of a CPU Heat Sink Geometry. CFD Letters13(3), pp.1-15.

MOHAMMED, A.A. and RAZUQI, S.A., 2021. Effect of air fan position on heat transfer performance of elliptical pin fin heat sink subjected to impinging air flow. Journal of Thermal Engineering7(6), pp.1406-1416.

Singh, G., Kumar, R. and Mikielewicz, D., 2021. Effect of Flow Normalization in Micro-Pin-Finned Heat Sink: Numerical Study. Journal of Thermophysics and Heat Transfer35(1), pp.28-37.

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