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ÎÒÔÚ±àдÓÃPR·½³ÌÇó½â³¬ÁÙ½çco2ÃܶȵÄUDF³ÌÐòʱ²ÉÓõÄÊÇÊ¢½ð¹«Ê½£¬µ«ÎÒÖ»¿¼ÂÇÁËÊ¢½ð¹«Ê½Öеæ¤=B^2£4AC>0ʱµÄÇé¿ö£¬ËùÒÔÔÚ³õʼ»¯Á÷³¡Ê±Í¨²»¹ý£¬ÇóÄÄλ´óÏÀ¿ÉÒÔ°ïÎÒ·ÖÎö·ÖÎö£¬¼±ÇóÓÐÀàËÆµÄ³ÌÐò£¬»òҲд¹ý´Ë³ÌÐòµÄÄܹ»°ïÖúÎÒһϣ¬Ð»Ð»ÁË¡£»òÕß¿ÉÒÔÌṩһ¸öCÓïÑÔÇóÈý´Î·½³Ì¸ùµÄ³ÌÐò£¬ÆäÖÐa,b,c,d¶¼ÊDZäÁ¿µÄ£¬¸½ÉÏÎÒдµÄ³ÌÐò£º #include "udf.h" #define TC 305.25 #define PC 7380000 #define W 0.225 #define R 8.314 #define tc 305.25 #define pc 7375000 #define w 0.225 #define r 8.314 DEFINE_PROPERTY(cell_density, cell, thread) { real dd; real temp = C_T(cell, thread); real pres = C_P(cell, thread); real tr,k,a1,a2,a,b,a3,a4,a5,a6,b1,b2,b3,y1,y2,y3,x; tr = temp/TC; k = 0.37464+1.54226*W-0.26992*W*W; a1 = (1+k*(1-sqrt(tr)))*(1+k*(1-sqrt(tr))); a2 = 0.45724*R*R*TC*TC/PC; a = a1*a2; b=0.0778*R*TC/PC; a3=pres; a4=pres*b-R*temp; a5=a-3*pres*b*b-2*R*temp*b; a6=pres*b*b*b+R*temp*b*b-a*b; b1 = a4*a4-3*a3*a5; b2 = a4*a5-9*a3*a6; b3 = a5*a5-3*a4*a6; y1 = b1*a4+3*a3*(-b2+sqrt(b2*b2-4*b1*b3))/2; y2 = b1*a4+3*a3*(-b2-sqrt(b2*b2-4*b1*b3))/2; if (y1<0) {y3=-y1;} else {y3=y1;} x = (-a4-(pow(y3,0.33333)-pow(-y2,0.33333)))/(3*a3); dd =44/(1000*x); return dd; } UID99953 Ìû×Ó5 ¾«»ª0 »ý·Ö10 ÔĶÁȨÏÞ10 À´×ÔºþÄÏ ÔÚÏßʱ¼ä11 Сʱ ×¢²áʱ¼ä2010-8-31 ×îºóµÇ¼2012-7-18 ²é¿´Ïêϸ×ÊÁÏ |
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