sunfluidh:radiative_heat_transfer_dom_setup_namelist
Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédente | ||
sunfluidh:radiative_heat_transfer_dom_setup_namelist [2016/12/13 12:15] – [Tref] cadet | sunfluidh:radiative_heat_transfer_dom_setup_namelist [2016/12/14 18:42] (Version actuelle) – [Namelist Radiative_Heat_Transfer_DOM] cadet | ||
---|---|---|---|
Ligne 1: | Ligne 1: | ||
===== Namelist " | ===== Namelist " | ||
- | This data set is used to define the radiative problem. Otherwise, it can be omitted. | ||
- | This module considers the Radiative Transfer Equation (RTE) for an emitting-absorbing non-scattering medium enclosed by difuse boundaries. | ||
- | To take into account the gas behavior, it considers both gray-gas assumption as well as real gas behavior through the Spectral-Line-Weighted-Sum-of-Gray-Gases (SLW) model. The final RTE-SLW problem is then discretize with the Discrete Ordinates Method (DOM). | ||
- | **The DOM** discretize the $4\pi$ steradians angular integration in a set of $M$ discrete directions represented by their direct cosines and corresponding weights $\vec{q_m} = (\vec{s_m},\omega_m) = (\mu_m,\eta_m, | + | __** Not for the release SUNFLUIDH_EDU**__ .\\ |
+ | This data set is used to define the radiative problem. Otherwise, it can be omitted.\\ | ||
+ | This module considers the Radiative Transfer Equation (RTE) for an emitting-absorbing non-scattering medium enclosed by diffuse boundaries. | ||
+ | To take into account the gas behavior, it considers both gray-gas assumption as well as real gas behavior through the Spectral-Line-Weighted-Sum-of-Gray-Gases | ||
+ | The final RTE-SLW problem is then discretize with the Discrete Ordinates Method (DOM). | ||
+ | **The DOM** discretize the $4\pi$ steradians integration in a set of $M$ discrete directions represented by their direct cosines and corresponding weights $\vec{q_m} = (\vec{s_m}, | ||
**The SLW model** will change the spectral integration in a weighted sum of $N_g$ gray-gases represented by their absorption coefficient and corresponding weights $(\kappa_j, | **The SLW model** will change the spectral integration in a weighted sum of $N_g$ gray-gases represented by their absorption coefficient and corresponding weights $(\kappa_j, | ||
Thus, the resulting **RTE-SLW-DOM** problem for emitting-absorbing non-scattering medium stands as below : | Thus, the resulting **RTE-SLW-DOM** problem for emitting-absorbing non-scattering medium stands as below : | ||
- | $\vec{s}_m \cdot \nabla I_j^m (x_i, | + | \begin{equation} |
+ | \vec{s}_m \cdot \nabla I_j^m (x_i, | ||
+ | \end{equation} | ||
- | where $I_j^m$ is the radiative intensity for the virtual gray-gas $j$ in direction $m$ and $I_b$ is the blackbody radiative intensity | + | where $I_j^m$ is the radiative intensity for the virtual gray-gas $j$ in direction $m$ and $I_b$ is the blackbody radiative intensity. |
- | The **dimensional** radiative source term $S_r$ and the boundary net radiative heat flux $q_r^{net}$ are defined as : | + | The **dimensional** radiative source term $S_r$ and boundary net radiative heat flux $q_r^{net}$ are defined as : |
- | $S_r(x_i, | ||
- | ${q}_r^{net}(x_i^{wall}) = \varepsilon_{wall} \left[ \sigma_B ({T}(x_i^{wall}))^4 - \sum_{j=0}^{N_g} \sum_{m: | + | \begin{eqnarray} |
+ | S_r(x_i, | ||
+ | {q}_r^{net}(x_i^{wall}) | ||
+ | \end{eqnarray} | ||
where $\sigma_b$ is the Stefan-Boltzmann constant, $\varepsilon$ is the boundary emissivity and $\vec{n}$ is the normal to the wall pointing out of the domain. | where $\sigma_b$ is the Stefan-Boltzmann constant, $\varepsilon$ is the boundary emissivity and $\vec{n}$ is the normal to the wall pointing out of the domain. | ||
- | < | + | < |
===== Full data set of the namelist ===== | ===== Full data set of the namelist ===== | ||
Ligne 38: | Ligne 43: | ||
----- | ----- | ||
- | ===== Definition of the data set for the RTE problem ===== | + | ===== Definition of the data set for the DOM-RTE problem ===== |
----- | ----- | ||
==== activateRadiation ==== | ==== activateRadiation ==== | ||
Ligne 64: | Ligne 69: | ||
==== WallRadcoeff ==== | ==== WallRadcoeff ==== | ||
* Type : Real value | * Type : Real value | ||
- | * Prescaler on the net radiative heat flux at walls. | + | * Prescaler on the net radiative heat flux $q_r^{net}$ |
* **For debugging only**. | * **For debugging only**. | ||
* Default value = 1.0 | * Default value = 1.0 | ||
==== VolRadcoeff ==== | ==== VolRadcoeff ==== | ||
* Type : Real value | * Type : Real value | ||
- | * Prescaler on the radiative source term. | + | * Prescaler on the radiative source term $S_r$. |
* **For debugging only**. | * **For debugging only**. | ||
* Default value = 1.0 | * Default value = 1.0 | ||
Ligne 98: | Ligne 103: | ||
* Boundaries emissivities $\varepsilon$ sorted as (x-, | * Boundaries emissivities $\varepsilon$ sorted as (x-, | ||
* Default values = 0.0 0.0 0.0 0.0 0.0 0.0 | * Default values = 0.0 0.0 0.0 0.0 0.0 0.0 | ||
- | ----- | + | |
===== Definition of the data set for the SLW model ===== | ===== Definition of the data set for the SLW model ===== | ||
----- | ----- | ||
Ligne 116: | Ligne 121: | ||
* NbGas $\ge$ 2 : SLW model is employed | * NbGas $\ge$ 2 : SLW model is employed | ||
* Default value = 1 | * Default value = 1 | ||
+ | |||
+ | < | ||
==== ka_min , ka_max ==== | ==== ka_min , ka_max ==== | ||
* Type : Real values | * Type : Real values |
sunfluidh/radiative_heat_transfer_dom_setup_namelist.1481627745.txt.gz · Dernière modification : 2016/12/13 12:15 de cadet