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Spatial distribution of heat flux from a warm tip over a cold substrate

The files for this example may be found in the share/scuff-em/examples/TipSubstrate subdirectory of your scuff-em installation.

---

gmsh geometry files for paraboloidal tip and cylindrical substrate

• Paraboloid.geo
• Cylinder.geo

The following script generates coarse and fine meshes of these objects; it uses this script.

#!/bin/bash
for SHAPE in Paraboloid Cylinder
do
  for L in 1.0 0.5
  do
    gmsh -2 -clscale ${L} ${SHAPE}.geo -o ${SHAPE}.msh
    RenameMesh ${SHAPE}.msh
  done
done

---

gmsh geometry files

• TipSubstrate_Coarse.scuffgeo
• TipSubstrate_Fine.scuffgeo

---

List of geometric transformations

• TipSubstrate.trans

---

List of evaluation points

• EPFile

---

Run scuff-neq

#!/bin/bash
ARGS=""
ARGS="${ARGS} --geometry ../TipSubstrate_Fine.scuffgeo"
ARGS="${ARGS} --TransFile ../TipSubstrate.trans"
ARGS="${ARGS} --Omega 0.7"
ARGS="${ARGS} --EPFile ../EPFile"
ARGS="${ARGS} --Power --ZForce"

scuff-neq ${ARGS}

---

Plot $z$-directed Poynting flux from the tip through the vacuum and into the substrate:

gnuplot> plot 'TipSubstrate_Fine.SRFlux' u 5:9

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