Flow Over a Throttle Body

Introduction

The objective of this report is to understand the flow over a throttle valve and to practice the mesh refinement using converge tool, also, learning how to give motion to a body. 

Mesh

Below is the mesh for the throttle body. The mesh is refined around the the valve by the use of fixed embedding tool provided under grid control option of case setup the base grid is set to 2mm. In the fixed embedding menu the entity type is kept to be boundary and valve boundary Id is selected as we require precission around valve. the mesh is scaled down to 3 for two layers.

Pressure and Velocity Contours

Pressure and velocity contours are produced using paraview and are shown below.

Pressure Contour

The static pressure is reduced due to the throttle valve. it works as a nozel and increases the velocity which results in reduction of static pressure. 

Velocity Contour 

The velocity is reduced at the front of the valve due to stagnation and at the back due to seperation.

Plots 

Mass flow Rate at Inlet

Mass Flow Rate at Outlet

Total pressure at inlet

Total pressure at outlet

Static pressure at Inlet

Static pressure at outlet

Velocity at Inlet

Velocity at Outlet

Total Cell Count