搜索
2004.4.23-2004.4.25138%13%250031502512(a(n)=(1¡0:38)£a(n¡1)b(n)=0:38£a(n¡1)+(1¡0:13)£b(n¡1)+25(1)a(n)b(n)ABnA38%38%B13%13%A1Fick125AB1a(n)b(n)(a(n)=(1¡0:38)£a(n¡1)b(n)=(2¡0:38¡0:13)£b(n¡1)¡(1¡0:13)(1¡0:38)£b(n¡2)+0:38£25a(n)b(n)(a(n)=(0:62)na(0)b(n)=(0:87)nb(0)+0:87n¡1h1+0:87n¡2h2+:::+0:87hn¡1+hnhn=0:62n¡1(b(1)¡0:87b(0))+(0:62n¡2+:::+1)£9:5b(n)b(0)=2500;b(1)=3150n=1b(n)a(0)=2500na(n)b(n)125101520500100015002000250030001:a(n)b(n)nb(n)a(n)120a(n)b(n)2a(n)a(n)b(n)b(n)a(n)n!1a(n)!0a(n)!192:30:13£a(n)=25ABb(n)34250010%b(34)=245:9532204060801001002003004005006007002:a(n)b(n)33.1388922:5717499186445531185195548624416883.2FickJ®=¡D®¯dN®dz(2)32D®¯®¯3@N®@t¡D®¯½52N®=0(3)½D®¯½N®tN®steady°owv(x;y;z)tcirculationvorticity40090XYZZZ3.338%2:6¹v=400km2:6yr=4:8£10¡3m=sReynoldsnumberRR4000¹vR=½d¹v´´½¼1:4£10¡6m2=sd1m±=p´=½¼1:2£10¡3m23®¯D4Y90YYYX3.4ABBAn=(1+1338)=13%B13:53.5DTmm!1p¹v2vp¹v¹s2=2kBT6¼´a¢t4D¼1:5£10¡8kg=m¢sD½¼1:5£10¡11m2=s1011s102101010¡9m=s10¡1m=s10¡2m=s400km1yrZ5Z6XYZZ3.6NX3N(x;t)A74kBkBR56Z7n=068:@N®@t¡D®¯½@2N®@x2=0N®jx!¡1=N0;N®jx!+1=0@N®@xjx!¡1=0;@N®@xjx!+1=0N®jt=0=(N0x00x0(4)1£2n2D444:C9295999vvc017-40-2020400.20.40.60.815:9295999-15-10-55100.20.40.60.816:X3.7N®jt=0x0x082500N®jx!¡1N®jx!¡1AdobePhotoshop7:253.8(0;1)¹v=q8kBT¼M254Z924682004006008008:25865Kinzelbach,Wolfgang1987[]H.BrianGri±ths[]AdrianOldknow,1996:19952001()T.:19922001RichardA.Holmgren,AFirstCourseinDiscreteDynaimicalSystems,Springer-VerlagNewYork,Inc.199410