2. Computation fluid dynamics (CFD) is an engineering tool used to simulate the
action of thermo-fluids in a system.
3. CFD Definition:
CFD is a branch of fluid mechanics that uses numerical analysis to
analyze and solve problems that involve fluid flows. Computers are
used to perform the calculations required to simulate flow of the fluid,
and the interaction of the fluid with surfaces defined by boundary
conditions.
4. Overview of CFD:
• Three conservation laws govern fluid flow: (non-linear)
5. • Mathematical formulation of these laws leads to the governing
equations:
– Partial differential equations or
– Integral equations
6. Finite Volume Method
• Divide the domain into multiple control volumes or “cells”
• Reduce the problem to determining velocity and pressure values at
cell centers
12. Input data for boundary conditions
Inlet velocity, 𝑣𝑖𝑛 = (0.171 – 1.187) m/s
• Inlet temperature, 𝑇𝑖𝑛 =293 K
• Outlet pressure, 𝑃𝑜𝑢𝑡 = Gauge pressure
• Heat flux, 𝑞 = 200000 W/𝑚^2
13. • We are assuming inlet velocity, Vin= 0.999 m/s (for Re= 746)
• Counter flow
14. Set up:
• Computational fluid dynamics software ANSYS FLUENT was used to
conduct the simulation process. For general setup steady time,
pressure based type absolute velocity formulation was selected.
Energy equation was activated and the flow was selected as laminar.
For pressure, momentum and energy second order upwind equation
was selected. To get acceptable result residual factor was set to
10^−6.
