![向下移动与 \underbrace 关联的文本](https://linux22.com/image/438564/%E5%90%91%E4%B8%8B%E7%A7%BB%E5%8A%A8%E4%B8%8E%20%5Cunderbrace%20%E5%85%B3%E8%81%94%E7%9A%84%E6%96%87%E6%9C%AC.png)
有没有办法将与 相关的文本\underbrace{}
向下移动?我试图在下面标记的图像中描述我的意思。文本“热传导”不需要包含在左括号和右括号中,也不需要包含在方括号中。目标是通过将文本移到括号外来降低实际方程的整体高度。
如果有帮助,这里是用于生成多孔介质中的热传输方程的原始乳胶(如下所示):
\begin{equation*}
\underbrace{\left( 1+ \frac{1- \phi}{\theta} \frac{C_{P_{s}}}{C_{P_{w}}} \frac{\rho_s}{\rho_w} \right) \frac{\partial \left( \theta T \right) }{\partial t}}_\text{change in stored energy}=\frac{\partial }{\partial x_i} \left[ \theta \left( \underbrace{\frac {k_{T_{bulk}}}{\theta C_{P_{w}} \rho_w}}_{\text{Thermal} \atop \text{Conduction}} + \alpha \frac{\mathrm{q}}{\theta} \right) \cdot \frac{\partial T}{\partial x_j} \right] - \frac{\partial }{\partial x_i} \left( \theta v_i T \right) + q'_s T_s + \frac{\theta \gamma_w }{C_{p_{w}}} + \frac{ \left( 1 - \phi \right) \gamma_s }{C_{p_{w}}} \frac{\rho_s}{\rho_w}
\end{equation*}
答案1
如果您能够更新提供的原始 LaTeX 代码,则可以使用\biggl
...对手动选择适当的分隔符高度\biggr
:
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\noindent Original equation:
\begin{equation*}
\underbrace{
\left(
1 + \frac{1 - \phi}{\theta} \frac{C_{P_s}}{C_{P_w}} \frac{\rho_s}{\rho_w}
\right)
\frac{\partial \left( \theta T \right)}{\partial t}}_\text{change in stored energy}
=
\frac{\partial}{\partial x_i}
\left[
\theta
\left(
\underbrace{
\frac{k_{T_{bulk}}}{\theta C_{P_w} \rho_w}
}_{\text{Thermal} \atop \text{Conduction}}
+
\alpha \frac{\mathrm{q}}{\theta}
\right) \cdot \frac{\partial T}{\partial x_j}
\right]
-
\frac{\partial}{\partial x_i}
\left(
\theta v_i T
\right)
+ q'_s T_s + \frac{\theta \gamma_w}{C_{P_w}} + \frac{\left( 1 - \phi \right) \gamma_s}{C_{P_w}} \frac{\rho_s}{\rho_w}
\end{equation*}
\noindent Modified equation:
\begin{equation*}
\underbrace{
\biggl(
1 + \frac{1 - \phi}{\theta} \frac{C_{P_s}}{C_{P_w}} \frac{\rho_s}{\rho_w}
\biggr)
\frac{\partial ( \theta T )}{\partial t}}_\text{change in stored energy}
=
\frac{\partial}{\partial x_i}
\biggl[
\theta
\biggl(
\underbrace{
\frac{k_{T_\text{bulk}}}{\theta C_{P_w} \rho_w}
}_{\substack{\text{thermal} \\ \text{conduction}}}
+
\alpha \frac{\mathrm{q}}{\theta}
\biggr) \cdot \frac{\partial T}{\partial x_j}
\biggr]
-
\frac{\partial}{\partial x_i} (\theta v_i T)
+ q'_s T_s + \frac{\theta \gamma_w}{C_{P_w}} + \frac{(1 - \phi) \gamma_s}{C_{P_w}} \frac{\rho_s}{\rho_w}
\end{equation*}
\end{document}
其他细微变化包括:
- 删除不必要的
\left
...\right
组合 \text{bulk}
\substack{\text{thermal} \\ \text{conduction}}
- 持续使用
P_w