Shell Energy Source QCONV#

Shell Energy Source QCONV = {model_name} <float_list>

Description / Usage#

This card activates a heat source (or sink, as it were) in the shell_energy equation. The functional form of this source/sink is a lumped heat-transfer coefficient model, hence the QCONV in its name (see BC = QCONV card in main user manual). Currently two models {model_name} are permissible:


This model invokes a simple constant heat-transfer coefficient and reference temperature, viz.

q = H(T − Tref ). Commensurately there are two floats required:

<float1> - Heat transfer coefficient in units of Energy/time/L2/deg T E.g. W/m2-K in MKS units.

<float2> - Reference temperature.


This model also invokes a lumped parameter model, but the heat-transfer coefficient depends on the flow strength (Reynolds number), viz.

q = H(T − Tref ). Three floats are required:

<float1> - Thermal conductivity in units of Energy time/L/deg (e.g. W/m/k).

<float2> - Reference temperature.

<float3> - Latent heat of melting (Energy/M, e.g. J/Kg). This quantity is required due to the cross use of this in the shell_deltah equation (viz. EQ = shell_deltah).


Following is a sample card:

Shell Energy Source QCONV = MELT_TURB {thermal_conductivity} {Tref} {latent_heat}

Technical Discussion#

The MELT_TURB model warrants further discussion. The functional form of the heat transfer coefficient H is


Here cf is the coefficient of friction, which for now is taken as 8./Re.