Heat transfer performance of coal-burning Rijke combustors

The heat transfer performance of Rijke combustors is experimentally studied for grade A and Grade B coals. It is found that the improvement in the heat transfer is more for grade A coal than for grade B coal. Furthermore, the location of the heat release region is found to be critical in obtaining the heat transfer improvement. It is also found that the mere presence of oscillatory combustion does not necessarily lead to improved heat transfer

Trachyonychia

The word trachyonychia means rough nails. Trachyonychia can present in opaque and shiny variants. This is referred to as opaque trachyonychia and shiny trachyonychia. The diagnosis of trachyonychia is clinical and a nail unit biopsy is not required Trachyonychia is a benign disease that may regress spontaneously. The most common causes of trachyonychia are alopecia areata, lichen planus, and psoriasis. A variety of treatment options exist, and the treatment should be conservative since this is a non-scarring condition