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Faucet

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Introduction

A steady-state simulation of flow within a water faucet.  Water enters through hot and cold inlets, mixes as it passes through a central riser, and exits through the faucet discharge. Temperature distributions, mixing, and flow patterns are predicted.

Applications

  • Mixing and thermal distribution.
  • Pipe and duct flows.

Capabilities covered in this demonstration

  • Turbulent flow and turbulent mixing.
  • Transport of energy and thermal mixing.
  • Temperature, pressure and velocity distribution.

Description & Performance Data

A steady-state simulation of hot and cold water flow within a faucet.

Mesh Topology:

A single block

 

Data Type:

Unstructured

No. Control Volumes:

~ 765,000

Precision:

Single

GPU Type:

Nvidia K40 

No. GPU Devices:

GPU memory usage:

 

CPU Type:

Intel i7-4930K

No. CPU Devices:

2

 

Model

 

The geometry is representative of a typical household water faucet.  Valves are not present or simulated. 
 

 faucet_geometry.png

Results

Hot and cold water sources are thoroughly mixed upon entry to the riser, with a uniform temperature distribution downstream of the riser entry.  Water exiting the riser impinges on the upper surface of the faucet outlet, creating a pair of counter-rotating vortices which are the dominant flow features present in the foucet outlet and discharge.

 

faucet_temperature.png

 

Stream lines 1.png Stream lines 2.png
EXN-Velocity.png EXN-Temperature.png

 

Performance

Timesteps:

200

Time/Timestep:

 8.3 s

Solution Time:

 27.6 minutes

 

Simulation Cost

Below is a chart of the simulation's cost depending on mesh configuration and subscription plan. Note that there is a minimum of 3 times speed-up for structured meshes when using EXN/Aero. 

The on-demand costs are for our pay-as-you-go plan where you only pay for the time you use. The HPC Plan is our monthly subscription that includes a block of compute hours on our platform. Lastly, the stacking cost describes the simulation cost for running 7 simulations in parallel (for the same hourly on-demand rate). 

chart2.png

Keywords 

  • Mixing
  • Turbulence
  • Steady-State
  • RANS
  • Energy
 
2017-12-12

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