The Weissenberg number (Wi) is a dimensionless number used in the study of viscoelastic flows. It is named after Karl Weissenberg. The dimensionless number compares the elastic forces to the viscous forces. It can be variously defined, but it is usually given by the relation of stress relaxation time of the fluid and a specific process time. For instance, in simple steady shear, the Weissenberg number, often abbreviated as Wi or We, is defined as the shear rate {\displaystyle {\dot {\gamma }}}{\displaystyle {\dot {\gamma }}} times the relaxation time {\displaystyle \lambda }\lambda . Using the Maxwell model and the Oldroyd-B model, the elastic forces can be written as the first Normal force (N1).

#张艺兴[超话]##张艺兴1007生日快乐##现在的你想和几岁的张艺兴相遇##张艺兴这就是街舞4##张艺兴我只喜欢你#

离宝贝的生日没几天了 总算赶完了我可爱的入坑小砖图 小飞象是我永远的TOP1[抱一抱]

实力有限 只能把小砖块码成这样 接下来抓紧串珠片

不知道哪个可爱贝贝在B站上传了加速版#你的感觉 (Can you feel me)[音乐]#的饭拍 在她兴奋的尖叫声中我被艺兴有趣的编曲吸引 后来就慢慢在坑底躺平了

艺兴 虽然很多人都更为认可你的舞蹈 但你的歌真的很有趣 很耐听 我这个渴莲人好想看你新鲜的舞台啊[awsl]

现在的我想和2018年26.46575岁的张艺兴相遇，在现场感受他的绝美舞台[打call]

PS：有时间再多串几个不同颜色的贝贝围绕你[偷笑]

@努力努力再努力x

#小张翻译的自我修养#
语言无好坏之分 就 开拓新思路

不指望A像B一样广为流传
▪️I don’t expect A to be widely spread as B
▫️I can’t see A achieving the popularity of B

渴望从xxx中解脱
▪️people wants to get rid of xxx
▫️many crave liberation from xxx

很难做xxx
▪️it’s hard to
▫️struggle to

笃信
▪️firmly believe that
▫️take the unapologetic insistence that

青睐的xx
▪️xxx we like
▫️xxx we fall for

不顾xxx
▪️regardless of
▫️irrespective of

出于xxx原因
▪️for xxx reasons
▫️on xxx grounds

在书的内页
▪️xxx inside of the book
▫️xxx lies between the covers

可供参考的档案
▪️documents that you can turn to
▫️an archive to draw on

让xxx派上用场
▪️take advantage of xxx/make use of xxx
▫️make xxx usable

一团遭
▪️what a mess!
▫️what a clutter!