吉林大学学报(理学版)
吉林大學學報(理學版)
길림대학학보(이학판)
Journal of Jilin University (Science Edition)
2015年
5期
930-933
,共4页
李华鹏%朱秀丽%徐中海%袁洪君
李華鵬%硃秀麗%徐中海%袁洪君
리화붕%주수려%서중해%원홍군
边界层%边界层厚度%收敛率%消失扩散极限
邊界層%邊界層厚度%收斂率%消失擴散極限
변계층%변계층후도%수렴솔%소실확산겁한
boundary layer%BL-thickness%convergence rates%vanishing diffusivity limit
利用能量估计的方法考虑一类 Boussinesq 方程组的初边值问题,研究当扩散系数ε→0时的边界层效应和收敛率,给出了边界层厚度的阶数 O(εβ)(0<β<2/3)。结果表明,与现有方法相比所得到的边界层厚度更薄,并且提高了收敛率。
利用能量估計的方法攷慮一類 Boussinesq 方程組的初邊值問題,研究噹擴散繫數ε→0時的邊界層效應和收斂率,給齣瞭邊界層厚度的階數 O(εβ)(0<β<2/3)。結果錶明,與現有方法相比所得到的邊界層厚度更薄,併且提高瞭收斂率。
이용능량고계적방법고필일류 Boussinesq 방정조적초변치문제,연구당확산계수ε→0시적변계층효응화수렴솔,급출료변계층후도적계수 O(εβ)(0<β<2/3)。결과표명,여현유방법상비소득도적변계층후도경박,병차제고료수렴솔。
We considered an initial-value problem for a class of Boussinesq equations using the energy estimate method.We mainly studied the boundary layer effect and the convergence rate as the thermal diffusion parameter ε→ 0,giving that the boundary layer thickness is of the order O (εβ)with 0<β<2/3.Compared with the existing methods, the present method presented more thinner BL-thickness.In addition,the convergence rate was also improved.