more tweaks

AMReX-Astro · Feb 11, 2025 · 635669c · 635669c
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diff --git a/Docs/source/eos_cell.rst b/Docs/source/eos_cell.rst
@@ -28,10 +28,8 @@ The parameters that affect the thermodynamics are:
 
 * ``unit_test.temperature`` : the initial temperature
 
-The composition can be set in the same way as in ``burn_cell``, either
-by setting each mass fraction explicitly via the parameters,
-``unit_test.X1``, ``unit_test.X2``, ..., or forcing them to be all
-equal via ``unit_test.uniform_xn=1``.
+The composition can be set either by specifying individual mass fractions
+or setting ``unit_test.uniform_xn`` as described in :ref:`sec:defining_unit_test_composition`.
 
 
 Building and Running the Code

diff --git a/Docs/source/jac_cell.rst b/Docs/source/jac_cell.rst
@@ -38,10 +38,15 @@ The parameters that affect the thermodynamics are:
 
 * ``unit_test.temperature`` : the initial temperature
 
-While the mass fractions can be set individually (using
-``unit_test.X1``, ``unit_test.X2``, ...), it is recommended to use
-``unit_test.uniform_xn=1`` to initialize all the mass fractions to be
-equal.
+The composition can be set either by specifying individual mass fractions
+or setting ``unit_test.uniform_xn`` as described in :ref:`sec:defining_unit_test_composition`.
+
+If the values don't sum to ``1`` initially, then the test will do a
+normalization.  This normalization can be disabled by setting:
+
+::
+
+    unit_test.skip_initial_normalization = 1
 
 
 Building and Running the Code

diff --git a/Docs/source/unit_test_runtime_parameters.rst b/Docs/source/unit_test_runtime_parameters.rst
@@ -25,7 +25,7 @@ Most of the unit tests require a composition to be defined (for the
 initial mass-fractions, $X_k$).  There are a few ways this can be done
 (depending on the test).
 
-* One-zone (`*_cell`) tests usually do one of:
+* One-zone (``*_cell``) tests usually do one of:
 
   * *Explicitly setting the individual mass fractions.*  This is
     controlled by the parameters ``unit_test.X1``, ``unit_test.X2``, ..., ``unit_test.X35``,

diff --git a/unit_test/test_sdc_vode_rhs/vode_rhs_test.H b/unit_test/test_sdc_vode_rhs/vode_rhs_test.H
@@ -23,7 +23,7 @@ void do_vode_rhs()
 
     for (int n = 1; n <= NumSpec; ++n) {
 
-        massfractions[n-1] = get_xn(n);
+        massfractions[n-1] = get_xn(n, unit_test_rp::uniform_xn);
 
         if (massfractions[n-1] < 0 || massfractions[n-1] > 1) {
             amrex::Error("mass fraction for " + short_spec_names_cxx[n-1] + " not initialized in the interval [0,1]!");