From 318457e1abacd4d742bad59abf67baefe36d7ea6 Mon Sep 17 00:00:00 2001
From: William Fullmer <william.fullmer@netl.doe.gov>
Date: Fri, 26 Mar 2021 17:22:36 -0400
Subject: [PATCH] add Gunn HTC
---
docs/source/inputs/InputsCoupling.rst | 37 ++++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
diff --git a/docs/source/inputs/InputsCoupling.rst b/docs/source/inputs/InputsCoupling.rst
index 7bb0f73..690f897 100644
--- a/docs/source/inputs/InputsCoupling.rst
+++ b/docs/source/inputs/InputsCoupling.rst
@@ -35,7 +35,8 @@ With the variables defined as follows:
.. code:: shell
- * \brief Returns: the calculated drag coefficient.
+ /*
+ * \brief Returns: the calculated drag coefficient.
*
* Inputs:
* EPg - gas volume fraction
@@ -129,3 +130,37 @@ The Gidaspow model is defined as
{
return 0.0;
}
+
+
+
+Heat Transfer Coefficient
+-------------------------
+
+
+The following inputs must be preceded by "mfix."
+
++-------------------+---------------------------------+-------------+--------------+
+| | Description | Type | Default |
++===================+=================================+=============+==============+
+| convection_type | Which HTC model to use | String | RanzMarshall |
++-------------------+---------------------------------+-------------+--------------+
+
+The options currently supported in mfix are :cpp:`RanzMarshall` (default) and :cpp:`Gunn`.
+In both models the HTC is determined from a Nusslet number corelation.
+
+The RanzMarshall Nusselt number correlation is defined as:
+
+ .. code:: shell
+
+ amrex::Real N_Nu = 2.0 + 0.6 * std::sqrt(N_Re) * std::pow(N_Pr, 0.333);
+
+
+The Gunn Nusselt number correlation is defined as:
+
+ .. code:: shell
+
+ amrex::Real N_Nu =
+ (7 - 10*EPg + 5*EPg*EPg)*(1 + .7*std::pow(N_Re, 0.2)*std::cbrt(N_Pr))
+ + (1.33 - 2.4*EPg + 1.2*EPg*EPg)*std::pow(N_Re, 0.7)*std::cbrt(N_Pr);
+
+
--
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