Infinite-acting and infinite-supply micromodel systems

A microfluidic device to model subterranean fluid flow, the microfluidic device comprising:

• a mold of solid material, the mold comprising:
• a field of pores and throats formed in the mold, the pores are interconnected via the throats and the pores have a larger cross-sectional area than the throats;
• a peripheral channel formed in the mold, the peripheral channel tracing at least 50% of a perimeter or circumference of the field of pores and throats, the peripheral channel in fluid communication with the pores and throats, the peripheral channel having a larger cross-sectional area than the pores and the throats;
• a plurality of interior channels formed in the mold, the plurality of interior channels at least partially traversing the field of pores and throats, the plurality of interior channels are in indirect fluid communication with the pores and throats, each interior channel of the plurality of interior channels having a larger cross-sectional area than the pores and the throats;
• at least one interior channel of the plurality of interior channels coupled to a side channel through which the at least one interior channel communicates with the field of pores and throats of the field;
• a first fluid port disposed in the microfluidic device, the first fluid port in direct fluid communication with a first end of a first interior channel;
• and
• a second fluid port disposed in the microfluidic device, the second fluid port in direct fluid communication with one end of the peripheral channel.