commit 0e6ca9dba92f2638b22ce65d12684aeb4bdf3f05
parent f84c3792c58e44379d5e38c632efbd6c651d277e
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date: Mon, 4 Jan 2021 17:18:58 +0100
Quelques changements dans le README
Diffstat:
2 files changed, 20 insertions(+), 24 deletions(-)
diff --git a/README.md b/README.md
@@ -46,8 +46,8 @@ in these boundary STL files which coincide with the triangles in the solid STL
files must be *rigorously* the same. This *conformal mesh* constraint is also
required for adjacent solids that share a common interface.
-Finally you can watch the `model.txt` file which is the `stardis` input data
-file. In this file we *connect*:
+Finally you can have a look at the `model.txt` file which is the `stardis` input
+data file. In this file we *connect*:
- physical properties (thermal conductivity, thermal capacity, ...) to the
geometrical data (here `solid.stl` only);
@@ -79,13 +79,13 @@ You can also simply invoke the `stardis` program in order to compute the
temperature at the center of the cube at steady state, by using the following
command:
- ~/Stardis-StarterPack/cube $ stardis -M model.txt -p 0.5,0.5,0.5,INF -e
+ ~/Stardis-StarterPack/cube $ stardis -M model.txt -p 0.5,0.5,0.5 -e
Please refer to the
[stardis](https://www.meso-star.com/projects/stardis/man/man1/stardis.1.html)
man page for an explanation about command-line options. The Bash script can be
edited and modified. For instance, in section "USER PARAMETERS", the number of
-Monte-Carlo samples or the value of the probe time can be updated.
+Monte-Carlo samples or the value of the probe time can be changed.
#### Dump some "thermal paths"
@@ -103,7 +103,7 @@ The script `run_dump_paths.sh` invokes `stardis` twice:
yet allows the visualization of thermal paths in a complex geometry where
radiative, convective and conductive heat transfers are coupled.
-You can update the numbers of paths or the probe position by editing the script.
+You can modify the number of paths or the probe position by editing the script.
#### Green function evaluation
@@ -111,10 +111,8 @@ The last script `run_green_evaluation.sh` shows how to estimate the Green
function with `stardis` and how to use it with the `sgreen` program. On first
invocation, the script runs `stardis` to evaluate the Green function by
generating the required number of thermal paths and store some data (the end
-position of each path) in a binary file. This Green function is evaluated only
-for a probe position (defined in the `USER PARAMETERS SECTION`: whenever
-`X`, `Y`, `Z` or the number of Monte-Carlo samples `NREAL` are
-modified, a new Green function will be evaluated.
+position of each path) in a binary file. This Green function is evaluated
+for the probe position defined in the `USER PARAMETERS SECTION`.
This Green function is independent of the value of the sources (values of
boundary and initial conditions, as well as the volumetric source term). If you
@@ -125,20 +123,18 @@ the current values of sources (no matter whether they have been modified or
not); in order to modify the values of the sources, the following line should
be modified in the script:
- SOURCES_AND_BOUNDARIES="CUBE.VP = 12 LTEMP.T = 290 RTEMP.T = 310 ADIA.F = 5.2"
+ SOURCES_AND_BOUNDARIES="CUBE.VP=12 LTEMP.T=290 RTEMP.T=310 ADIA.F=5.2"
with `CUBE.VP` the value of the volumetric source term (in W/m^3); `LTEMP.T`
and `RTEMP.T` the values of the temperature on the left (`LTEMP`) and right
-(`RTEMP`) boundaries respectively; and `ADIA.F` the value of the heat flux
-density imposed to the boundary `ADIA` (in W/m^2). The names `CUBE`, `RTEMP`,
-`LTEMP` and `ADIA` refer to the names given in the file `model.txt`
+(`RTEMP`) boundaries respectively (in K); and `ADIA.F` the value of the heat flux
+density imposed to the boundary `ADIA` (in W/m^2). The names of the sources (here
+`CUBE`, `RTEMP`, `LTEMP` and `ADIA`) are simply the names used in the `model.txt`
+file.
-We point out that it is not currently possible to define the value of `ADIA.T`:
-in the `model.txt` file, the boundary `ADIA` has been assigned a value of flux
-density using the `F_BOUNDARY_FOR_SOLID` keyword. If this boundary should be
-assigned a given temperature (Dirichlet condition), a different `model.txt`
-file should be generated using the `T_BOUNDARY_FOR_SOLID` keyword for this
-boundary.
+Please note that `ADIA` being a boundary of type flux (defined by the
+`F_BOUNDARY_FOR_SOLID` keyword in the `model.txt` file) the corresponding source
+value is named `ADIA.F` and not `ADIA.T` as for boundaries of type temperature.
### The heatsink
@@ -171,9 +167,9 @@ the resolution of the image and the number of samples per pixel. For each pixel
of the image, the luminance is computed by Monte-Carlo and the number of
realizations is the specified number of samples per pixel. Computing a
high-definition image with little statistical noise can therefore take a long
-time (many hours). The values of the parameters that are provided in the script
-should result in a computational time of about a dozen minutes on a correct
-desktop computer.
+time (many hours). The values of the parameters provided in the script
+should result in a computation time of about a dozen minutes on a recent
+low-end desktop computer.
More information about the rendering is provided in the `stardis` man page (such
as the parameters associated with the point of view).
@@ -181,7 +177,7 @@ as the parameters associated with the point of view).
Acknowledgement to Cyril Caliot who designed the porous model for the Optisol
project (ANR-11-SEED-0009, PROMES-CNRS, CIRIMAT, SICAT, LTN). This model
represents an ideal metallic or SiC foam. This type of foam is used in the
-design of heat exchangers in concentrated solar processes, in order to transfer
+design of heat exchangers in concentrated solar processes in order to transfer
incoming solar radiation energy to a working fluid.
## Copyright notice
diff --git a/cube/run_green_evaluation.sh b/cube/run_green_evaluation.sh
@@ -20,7 +20,7 @@ NREAL=10000
X=0.5
Y=0.5
Z=0.5
-SOURCES_AND_BOUNDARIES="CUBE.VP = 12 LTEMP.T = 290 RTEMP.T = 310 ADIA.F = 5.2"
+SOURCES_AND_BOUNDARIES="CUBE.VP=12 LTEMP.T=290 RTEMP.T=310 ADIA.F=5.2"
GREEN_FILE=probe_X${X}-Y${Y}-Z${Z}_N${NREAL}.green
SETTINGS_FILE=settings.txt
### END USER PARAMETERS SECTION
