Bubble content However,the heat diffusion equation is hard to solve analytically Approximated solution for RT。-IB(器）)，R mo-()/r盟 du -Using results from former 人) [R(x)2 dx [fR4(g)d划 It can introduce to R-P equationBubble content • However, the heat diffusion equation is hard to solve analytically • Approximated solution – for – Using results from former – It can introduce to R-P equation