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guozihpu

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DEFINE_ON_DEMAND(third_gradient)
{
        Domain *d;
        Thread *t;
        cell_t c;
        d=Get_Domain(1);
        thread_loop_c(t,d)
        {
                begin_c_loop(c,t)
                        {
                        /***********************ËÙ¶ÈÒ»½×Çóµ¼****************************/
                C_UDSI(c,t,dudx)=(C_U_G(c,t)[0]);                       /***********du/dx**************/
                        }
                end_c_loop(c, t)
        }
        thread_loop_c(t,d)
        {
                begin_c_loop(c,t)
                        {
                        /***********************Ëٶȶþ½×Çóµ¼****************************/
                C_UDMI(c,t,ddudxdx)=(C_UDSI_G(c,t,dudx)[0]);            /******************d^2u/dx^2*********************/
                        }
                        end_c_loop(c, t)
        }
}
Ö»ÒªÒ»µ÷ÓÃC_UDSI_G(c,t,dudx)[0]£¬¾Í»á³ö´í¡£Â鷳Сľ³æµÄÍøÓѸø¿´¿´£¬À§ÈÅÎҺó¤Ê±¼ä£¬Ò»Ö±½â¾ö²»ÁË
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