Impacts of Physical and Chemical Heterogeneity on Cocontaminant Transport in a Sandy Porous Medium

1996 ◽  
Vol 32 (4) ◽  
pp. 801-818 ◽  
Author(s):  
Andrew F. B. Tompson ◽  
Annette L. Schafer ◽  
Robert W. Smith
Keyword(s):  
Porous Medium ◽  
Chemical Heterogeneity ◽  
Physical And Chemical

scholarly journals On the Advanced Technique of Mathematical and Computer Simulation of Filtration Processes in Porous Media under the Influence of Physical and Chemical Factors

2019 ◽  
pp. 33-34
Author(s):  
Volodymyr Gerus
Keyword(s):  
Computer Simulation ◽  
Porous Medium ◽  
Porous Media ◽  
Advanced Technique ◽  
Variable Porosity ◽  
Continuity Equations ◽  
Mathematical And Computer Simulation ◽  
Chemical Factors ◽  
Physical And Chemical

The proposed improvement of the technique for deriving filtration equations in soils with variable porosity is described. The technique is based on the application of the apparatus of complete derivatives in the soil phase continuity equations. Examples of filtration equations in the case of a deformable and non-deformable skeleton of a porous medium are given.

Study of the Hot Top Performance with Various Heat Insulators

2017 ◽  
Vol 265 ◽  
pp. 1099-1103 ◽  
Author(s):  
D.V. Rutskii ◽  
N.A. Zyuban ◽  
S.B. Gamanyuk
Keyword(s):  
Heat Loss ◽  
Thermal Performance ◽  
Product Yield ◽  
Heat Losses ◽  
Chemical Heterogeneity ◽  
Hot Top ◽  
Heat Center ◽  
Physical And Chemical ◽  
Quantity Of Heat ◽  
Performance Calculation

The paper contains a thermal performance calculation which proves that the basic items of heat loss include heat losses spent heating the hot top casing and lining. If thermal insulation is used, losses through the metal mirror do not exceed 3.5%. It is shown that in order to improve hot top efficiency it is required to minimize losses spent on heating the lining and the hot top casing; consequently, the amount of the heat transferred to the solidifying ingot can be increased. The assessment of the performance of the hot top with various heat insulators proves that the most efficient one is the untapered (straight) hot top insulated with the MKPB-340 inserts: in this case the quantity of heat transferred to the chill amounts to 70% of the overall value. An alteration of the hot top insulation type and geometry makes it possible to improve hot top thermal performance. As a result, the heat center of the solidifying ingot shifts to the hot top. Consequently, the shrinkage of solidifying steel is efficiently compensated, which decreases the physical and chemical heterogeneity of the billets produced and improves the ingot-to-product yield.

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